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8/3/2019 Curatare pietre pretioase
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Cleaning & CareGemstone treatments that QVC does not knowingly accept.
QVC makes every effort to ensure that all items we sell meet our strict quality standards. The chart belowrepresents those gemstone treatments that QVC does not knowingly accept.
To quickly find information on a specific gemstone, click the appropriate link below. Your page will "jump" tothe top of that section.
A - B C - E G - J L - O P - R S T - Z
Return to the chart of gemstone treatments that QVC knowingly accepts.
Gemstone Enhancementmethod
Purpose Frequencyused
Stability Special care
Agate (also seeonyx)
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Alexandrite
Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, ormanmadematerial.
To improveappearance &clarity.
Unknown UnknownWipe with softdamp clothonly.
Amazonite
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To improveappearance.
Unknown UnknownWipe with softdamp clothonly.
Amber- All
Colors
Coating withlacquer, ink, foil,films & other
appliedsubstances orbaked films.
To add color. UnknownPoor to
Fair
Wipe with softdamp cloth
only.
Amethyst Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, ormanmadematerial.Infilling withglass, plastic orresins.Diffusion usingchemicals
To improveappearance &clarity. Toproduce colorand/orasterism. Toimproveappearance,durability oradd weight.
Unknown Poor toFair
Wipe withdamp soft clothonly.
http://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#A%23Ahttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#C%23Chttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#G%23Ghttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#L%23Lhttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#P%23Phttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#S%23Shttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#T%23Thttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#C%23Chttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#G%23Ghttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#L%23Lhttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#P%23Phttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#S%23Shttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#T%23Thttp://www.qvc.com/jw_gia_no_chart.html?cp=jw_gia_guide&tmp=na&cont=1t#A%23A8/3/2019 Curatare pietre pretioase
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combined withheat. Dyed.
Ametrine
Oiling withcolorless orcolored oil.
Impregnated withwax, naturalresin, ormanmadematerial.Infilling withglass, plastic orresins.
To improve
appearance &clarity. Toimproveappearance,durability oradd weight.
UnknownPoor toFair
Wipe with softdamp clothonly.
Ammolite
Oiling withcolorless orcolored oil.Impregnated withwax, natural
resin, ormanmadematerial.
To improveappearance &clarity.
Unknown UnknownWipe with softdamp clothonly.
Andalusite
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.Oiling withcolorless orcolored oil.Impregnated with
wax, naturalresin, ormanmadematerial.
To add color,mask surfacedefects,enhance luster.
UnknownPoor toFair
Wipe with adamp soft clothonly.
Apatite
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.Oiling withcolorless orcolored oil.
Impregnated withwax, naturalresin, ormanmadematerial.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Aquamarine Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, ormanmadematerial.
Infilling withglass, plastic or
To improveappearance &clarity. Toimproveappearance,durability oradd weight.
Unknown Poor toFair
Wipe withdamp soft clothonly.
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resins.Dyed.
Aventurine,
Green
Coating withlacquer, ink, foil,films & other
appliedsubstances orbaked films.
To add color,mask surface
defects,enhance luster.
Occasionally
Poor to
Fair
Wipe with a
damp soft clothonly.
Beryl
Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, ormanmadematerial.Infilling withglass, plastic or
resins.Dyed.
To improveappearance &clarity. Toimproveappearance,durability oradd weight. Toadd color,mask surfacedefects,enhance luster.
UnknownPoor toFair
Wipe withdamp soft clothonly.
Calcite
Coating withlacquer, ink, foil,film or otherappliedsubstances orbaked films.
To add color,mask surfacedefects orenhance luster.
UnknownPoor toFair
Wipe with adamp soft clothonly.
Carnelian
Coating withlacquer, ink, foil,film or otherapplied
substances orbaked films.
To add color,mask surfacedefects or
enhance luster.
UnknownPoor toFair
Wipe with adamp soft cloth
only.
Cat's-eyeQuartz
Coating withlacquer, ink, foil,film or otherappliedsubstances orbaked films.
To add color,mask surfacedefects orenhance luster.
UnknownPoor toFair
Wipe with adamp soft clothonly.
Chalcedony(often called
agate or onyx)
Coating withlacquer, ink, foil,film or otherappliedsubstances orbaked films.
To add color,mask surfacedefects orenhance luster.
UnknownPoor toFair
Wipe with adamp soft cloth
only.
ChromeDiopside
Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, ormanmadematerial.Infilling withglass, plastic orresins.
To improveappearance &clarity. Toimproveappearance,durability oradd weight.
UnknownPoor toFair
Wipe with adamp soft clothonly.
Chrysoberyl Oiling with To improve Unknown Poor to Normal for all
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colorless orcolored oil.Impregnated withwax, naturalresin, ormanmade
material.
appearance &clarity.
Fair varieties listed.
Chrysoprase
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.Dyed.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Citrine
Oiling withcolorless orcolored oil.Impregnated with
wax, naturalresin, ormanmadematerial.Infilling withglass, plastic orresins.Dyed.
To improveappearance &clarity. Toimproveappearance,durability oradd weight.
UnknownPoor toFair
Wipe with adamp soft clothonly.
Coral
Coating withlacquer, ink, foil,film or otherappliedsubstances or
baked films.
To add color,mask surfacedefects orenhance luster.
UnknownPoor toFair
Avoidchemicals,cosmetics &ultrasoniccleaners.
Coral, Sponge
Coating withlacquer, ink, foil,film or otherappliedsubstances orbaked films.
To add color,mask surfacedefects orenhance luster.
OccasionallyPoor toFair
Avoidchemicals,cosmetics &ultrasoniccleaners.
Diamond,Natural Color white,champagne,
yellow
QVC does notaccept color orclarity treatmentsfor naturaldiamonds with
natural color.
To improvecolor andclarity.
OccasionallyFair toVeryGood
Normal. Clickhere forcleaning andcare
instructions .
Diamond,Treated color -yellow, green,blue, black, pink,green, and fancyhues
QVC does notaccept claritytreatments forcolor-treatednaturaldiamonds.
To improveclarity.
UnknownFair toGood
Normal. Clickhere forcleaning andcareinstructions.
Drusy Quartz
Coating withlacquer, ink, foil,films & otherappliedsubstances or
baked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
http://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.htmlhttp://www.qvc.com/cleanandcare.html8/3/2019 Curatare pietre pretioase
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Emerald
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
Dyed.Penetration offissures withcolored oil, waxor resin.
To improveappearance.To add color,mask surface
defects orenhance luster.
UsuallyFair toGood
Avoidtemperaturechanges,steaming,
chemicals &ultrasoniccleaners.
Fluorite
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Garnet
Coating with
lacquer, ink, foil,films & otherappliedsubstances orbaked films.Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, ormanmadematerial.
To improveappearance.To produce orimprove acolor.
UnknownPoor toFair
Wipe with adamp soft clothonly.
Hematite
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Howlite
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.Infilling with
glass, plastic orresins.Diffusion usingheat andchemicals.Dyed.
To improveappearance,durability oradd weight. Toadd color,mask surface
defects orenhance luster.To improve orproduce color.
OccasionallyPoor toFair
Wipe with adamp soft cloth
only.
Jade, Jadeite
Coating withlacquer, ink, foil,film or otherappliedsubstances orbaked films.
To add color,mask surfacedefects orenhance luster.
OccasionallyPoor toFair
Wipe with adamp clothonly.
Jade, Nephrite Coating withlacquer, ink, foil,
To add color,mask surface
Occasionally Poor toFair
Wipe with adamp soft cloth
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films & otherappliedsubstances orbaked films.
defects,enhance luster.
only.
Jasper
Coating with
lacquer, ink, foil,film or otherappliedsubstances orbaked films.
To add color,mask surfacedefects orenhance luster.
UnknownPoor toFair
Wipe with adamp soft clothonly.
Jet
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Kyanite
Coating with
lacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Labradorite
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Lapis Lazuli -Denim Lapis
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Malachite
Coating withlacquer, ink, foil,film or otherappliedsubstances orbaked films.
To add color,mask surfacedefects orenhance luster.
OccasionallyPoor toFair
Avoidchemicals &ultrasoniccleaners.
Moonstone - AllColors
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, ormanmadematerial.Infilling with
glass, plastic orresins.
To improveappearance,durability oradd weight. Toadd color,mask surfacedefects orenhance luster.To improveappearance &clarity.
UnknownPoor toFair
Wipe with adamp soft clothonly.
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Morganite (Pink
Beryl)
Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, or
manmadematerial.Infilling withglass, plastic orresins.Dyed.
To improveappearance &clarity. Toimproveappearance,durability or
add weight. Toadd color,mask surfacedefects,enhance luster.
UnknownPoor to
Fair
Wipe withdamp soft cloth
only.
Mother-of-pearl
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Mother-of-pearlWatch Dial
Coating with inkor foil.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Obsidian
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Onyx (see alsoagate)
Coating withlacquer, ink, foil,
films & otherappliedsubstances orbaked films.
To add color,
mask surfacedefects,enhance luster.
Occasionally Poor toFair
Wipe with adamp soft clothonly.
Opal
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.Oiling withcolorless orcolored oil.
Impregnated withwax, naturalresin, ormanmadematerial.Impregnated withcolorless oil,wax, and resins.
To improveappearanceand clarity. Toadd color,
mask surfacedefects,enhance luster.
RarelyFair to
Good
Wipe with adamp soft cloth
only.
Pearl - CulturedAkoya, CulturedFreshwater
Coating withlacquer, ink, foil,films & otherappliedsubstances or
baked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
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Peridot
Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, or
manmadematerial.Infilling withglass, plastic orresins.
To improveappearance,durability oradd weight. To
improveappearance &clarity.
Rarely GoodWipe with adamp soft cloth
only.
Prehnite
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Quartz
Coating with
lacquer, ink, foil,films & otherappliedsubstances orbaked films.Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, ormanmadematerial.
To add color,mask surfacedefects,enhance luster.To improveappearance &clarity.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Quartz - Cat's-eye, Tiger's-eye,Hawk's-eye,Drusy
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Quartzite
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Rhodochrosite
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
RhodoliteGarnet
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.Oiling with
colorless orcolored oil.
To improveappearance.To produce orimprove acolor.
Unknown Poor toFair
Wipe with adamp soft clothonly.
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Impregnated withwax, naturalresin, ormanmadematerial.
Rhodonite
Coating withlacquer, ink, foil,film or otherappliedsubstances orbaked films.Dyed.
To add color,mask surfacedefects orenhance luster.To even outcolor.
UnknownPoor toFair
Wipe with adamp soft clothonly. Avoidchemicals &ultrasoniccleaners.
Ruby
Intentional fillingof surfacecavities andfractures with aforeign material,including glass
and easily visibleunder 10 Xmagnification.Oiling withcolorless orcolored oil, wax,natural resin, ormanmadematerial.Dyed withcolored oil.Irradiation.
To improveapparent clarityandappearance.To changecolor.
CommonPoor toFair
Fracture fillings
in ruby arefragil. Avoidrepolishing orrecutting. Avoidchemicals &ultrasoniccleaners.
Sapphire - AllColors
Intentional filling
of surfacecavities andfractures with aforeign material,including glassand easily visibleunder 10 Xmagnification.Oiling withcolorless orcolored oil, wax,natural resin, ormanmadematerial.Dyed withcolored oil.Irradiation.
To improveapparent clarityandappearance.To changecolor.
CommonPoor toFair
Fracture fillingsin sapphire arefragil. Avoidrepolishing orrecutting. Avoidchemicals &ultrasoniccleaners.
Sard
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Shell - Abaloneand Other
Coating withlacquer, ink, foil,films & other
appliedsubstances or
To add color,mask surfacedefects,
enhance luster.
Occasionally Poor toFair
Wipe with adamp soft clothonly.
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baked films.
Sodalite
Coating withlacquer, ink, foil,films & otherapplied
substances orbaked films.
To add color,mask surfacedefects,
enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft cloth
only.
Spinel
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.Oiling withcolorless orcolored oil.Impregnated withwax, natural
resin, ormanmadematerial.
To add color,mask surfacedefects,enhance luster.To improveappearance &clarity.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Sugilite
Coating withlacquer, ink, foil,film or otherappliedsubstances orbaked films.
To add color,mask surfacedefects orenhance luster.
UnknownPoor toFair
Wipe with softdamp cloth only
Sunstone
Coating withlacquer, ink, foil,films & other
appliedsubstances orbaked films.Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, ormanmadematerial.
To add color,mask surfacedefects,enhance luster.To improveappearance &clarity.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Tanzanite(Zoisite)
Coating withlacquer, ink, foil,
films & otherappliedsubstances orbaked films.Oiling withcolorless orcolored oil.Impregnated withwax, naturalresin, ormanmadematerial.
To add color,mask surfacedefects,enhance luster.To improveappearance &clarity.
UnknownPoor toFair
Wipe with adamp soft clothonly.
Topaz - All
Colors
Oiling with
colorless orcolored oil, wax,
To improve
appearance &clarity. To
Unknown Poor to
Fair
Wipe with soft
damp clothonly.
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natural resin, ormanmadematerial for allcolors listed.Infilling withglass, plastic or
resins for allcolors listed.
improveappearance,durability oradd weight.
Tiger's-eyeQuartz, Brown,Red
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Tourmaline
Oiling withcolored oil, wax,natural resin, ormanmade
material for allcolors listed.Infilling withglass, plastic orresins for allcolors listed.Diffusion usingchemicalscombined withheat.Dyed.
To improveappearance &clarity. Toimproveappearance,durability oradd weight. Toimprove color.
OccasionallyPoor toFair
Wipe with softdamp clothonly.
Turquoise
Impregnated withcolorless oil orwax.Painted orlacquered withblack lines.Dyed.
To enhance orcreate color.To simulatematrix.
CommonlyPoor toFair
Avoid exposingturquoise
jewelry to hotwater &householdchemicals.Very specialcare required.Wipe gentlywith soft dampcloth only.
Unakite
Coating withlacquer, ink, foil,films & otherapplied
substances orbaked films.
To add color,mask surfacedefects,
enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Varisite
Coating withlacquer, ink, foil,films & otherappliedsubstances orbaked films.
To add color,mask surfacedefects,enhance luster.
OccasionallyPoor toFair
Wipe with adamp soft clothonly.
Zircon - Allcolors
Oiling withcolorless orcolored oil, wax,natural resin, or
manmadematerial for all
To improveappearance &clarity. Toimprove
appearance,durability or
Unknown Poor toFair
Wipe with softdamp clothonly.
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colors listed.Infilling withglass, plastic orresins for allcolors listed.
add weight.