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Exceptional Colombian Treasure: Color Changing 1.90 Andesine Feldspar
- SKU
- 1000BCT
- Dimensions (mm)
- 9 x 7 x 5mm
- Weight (cts)
- 1.9
- Treatment
- No Treatment
- Shape
- Fancy
- Type
- Faceted
- Clarity
- VVS
- Colours
-
Andesine is a silicate mineral, a member of the plagioclase feldspar solid solution series. Its chemical formula is (Ca, Na)(Al, Si)4O8, where Ca/(Ca + Na) (% anorthite) is between 30 and 50%. The formula may be written as Na0.7-0.5Ca0.3-0.5Al1.3-1.5Si2.7-2.5O8.[2]
The plagioclase feldspars are a continuous solid solution series and as such the accurate identification of individual members requires detailed optical study, chemical analysis or density measurements. Refractive indices and specific gravity increase directly with calcium content.[5]
It is sometimes used as a gemstone.[6]
| Shipping provider | Shipping to Pakistan | Shipping to rest of world | Combined Shipping (Pakistan) | Combined Shipping (rest of the world) |
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- SKU
- 1000BCT
- Dimensions (mm)
- 9 x 7 x 5 mm
- Weight (cts)
- 1.9
- Treatment
- No Treatment
- Shape
- Fancy
- Type
- Faceted
- Clarity
- VVS
- Colours
-
Andesine is a silicate mineral, a member of the plagioclase feldspar solid solution series. Its chemical formula is (Ca, Na)(Al, Si)4O8, where Ca/(Ca + Na) (% anorthite) is between 30 and 50%. The formula may be written as Na0.7-0.5Ca0.3-0.5Al1.3-1.5Si2.7-2.5O8.[2]
The plagioclase feldspars are a continuous solid solution series and as such the accurate identification of individual members requires detailed optical study, chemical analysis or density measurements. Refractive indices and specific gravity increase directly with calcium content.[5]
It is sometimes used as a gemstone.[6]
| Shipping provider | Shipping to Pakistan | Shipping to rest of world | Combined Shipping (Pakistan) | Combined Shipping (rest of the world) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
|
|
|
|
| FedEx |
|
|
|
|
| DHL |
|
|
|
|
| UPS |
|
|
|
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Welcome to the City Of Gems-Chanthaburi !! The City Of Gems-Chonburi has been operating from Chanth....
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Positive
What a wonderful stone. Just as advertised in photos. All possible issues (little cloud) were apparent in photos. Very happy with purchase. Great seller great and speedy communication. Looking forward to purchasing many products from this store.
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PositiveFast shipping. The stone is beautiful and looks just like the photos! Thank you!
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Positive
Awesome fast shipping. Incredibly beautiful quartz shining with the sky color of sun setting.
