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Exceptional Colombian Treasure: Color Changing 1.90 Andesine Feldspar
- UGS
- 1000BCT
- Dimensions (mm)
- 9 x 7 x 5mm
- Poids (cts)
- 1.9
- Treatment
- No Treatment
- Shape
- Fancy
- Type
- Faceted
- Clarity
- VVS
- Couleurs
-
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]
| Fournisseur d'expédition | Expédition vers Pakistan | Expédition dans le reste du monde | Expédition combinée ( Pakistan ) | Expédition combinée (reste du monde) |
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- UGS
- 1000BCT
- Dimensions (mm)
- 9 x 7 x 5 mm
- Poids (cts)
- 1.9
- Treatment
- No Treatment
- Shape
- Fancy
- Type
- Faceted
- Clarity
- VVS
- Couleurs
-
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]
| Fournisseur d'expédition | Expédition vers Pakistan | Expédition dans le reste du monde | Expédition combinée ( Pakistan ) | Expédition combinée (reste du monde) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
|
|
|
|
| FedEx |
|
|
|
|
| DHL |
|
|
|
|
| UPS |
|
|
|
|
Welcome to the City Of Gems-Chanthaburi !! The City Of Gems-Chonburi has been operating from Chanth....
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Positif
Nice stone nice store highly recommended 10/10
