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Rare Andesine 4.83 ct Rich Green Color Untreated SKU-12
- SKU
- Dimensions (mm)
- 12.140 x 9.940 x 6.930mm
- Weight (cts)
- 4.830
- Treatment
- No Treatment
- Shape
- Oval
- Type
- Faceted
- Colours
-
Andesine occurs in various colors, from red and honey-red to orange, yellow, champagne, and green. The semi-precious gemstone often shows greenish hints and a faint metallic shiller (or labradorescence). Some are even color-changing, displaying different hues under different types of lighting.
All plagioclase feldspars are composed of albite (sodium aluminum silicate) and anorthite (calcium aluminum silicate) in varying compositions. Other plagioclase minerals include bytownite, moonstone, oligoclase, and spectrolite, among others.
Andesine has a ratio of 30 to 50 percent anorthite to 50 to 70 percent albite, so some mineralogists classify it as an albite variety.
In terms of habits, andesine rarely forms as crystals; when it does, they’re usually small. Andesine crystals often display Albite, Pericline, and Carlsbad twinning. Usually, andesine is found in granular or massive habits.
Here’s an overview of andesine’s mineral traits:
Chemical formula: (Na,Ca)[Al(Si,Al)Si2O8]
Mohs hardness: 6 to 6.5
Color: White, gray, green, yellow, red, orange, pink, champagne, golden
Crystal structure: Triclinic
Luster: Sub-vitreous or pearly
Transparency: Transparent to opaque
Refractive index: 1.56 to 1.57; Increases with higher calcium content
Density: 2.66 to 2.68; Increases with higher calcium content
Cleavage: Perfect on {001}, good/distinct on {010}
Fracture: Subconchoidal or irregular/uneven
Streak: White
Luminescence: Fluorescence (weak); Red, blue, pink, yellow, or yellowish-brown in SW-UV, violet in MW-UV, and yellowish-white, orange, or orange-red in LW-UV
Birefringence: 0.009
Pleochroism: None
Dispersion: Weak to none
Optical effects: Sometimes color-changing
Feel free to to “make an offer” on our other items :)
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- SKU
- Dimensions (mm)
- 12.140 x 9.940 x 6.930 mm
- Weight (cts)
- 4.830
- Treatment
- No Treatment
- Shape
- Oval
- Type
- Faceted
- Colours
-
Andesine occurs in various colors, from red and honey-red to orange, yellow, champagne, and green. The semi-precious gemstone often shows greenish hints and a faint metallic shiller (or labradorescence). Some are even color-changing, displaying different hues under different types of lighting.
All plagioclase feldspars are composed of albite (sodium aluminum silicate) and anorthite (calcium aluminum silicate) in varying compositions. Other plagioclase minerals include bytownite, moonstone, oligoclase, and spectrolite, among others.
Andesine has a ratio of 30 to 50 percent anorthite to 50 to 70 percent albite, so some mineralogists classify it as an albite variety.
In terms of habits, andesine rarely forms as crystals; when it does, they’re usually small. Andesine crystals often display Albite, Pericline, and Carlsbad twinning. Usually, andesine is found in granular or massive habits.
Here’s an overview of andesine’s mineral traits:
Chemical formula: (Na,Ca)[Al(Si,Al)Si2O8]
Mohs hardness: 6 to 6.5
Color: White, gray, green, yellow, red, orange, pink, champagne, golden
Crystal structure: Triclinic
Luster: Sub-vitreous or pearly
Transparency: Transparent to opaque
Refractive index: 1.56 to 1.57; Increases with higher calcium content
Density: 2.66 to 2.68; Increases with higher calcium content
Cleavage: Perfect on {001}, good/distinct on {010}
Fracture: Subconchoidal or irregular/uneven
Streak: White
Luminescence: Fluorescence (weak); Red, blue, pink, yellow, or yellowish-brown in SW-UV, violet in MW-UV, and yellowish-white, orange, or orange-red in LW-UV
Birefringence: 0.009
Pleochroism: None
Dispersion: Weak to none
Optical effects: Sometimes color-changing
Feel free to to “make an offer” on our other items :)
We Accept Payment through
Paypal
Direct Deposit
Credit Cards
| Shipping provider | Shipping to Thailand | Shipping to rest of world |
|---|---|---|
| FedEx | $35.00 / 2 days | $35.00 / 5 days |
|
Thailand
FedEx is discounted to $35.00 on orders with 2 or more items
Rest of the world
FedEx is discounted to $35.00 on orders with 2 or more items
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| Express Shipping | $55.00 / 2 days | $55.00 / 7 days |
|
Thailand
Express Shipping is discounted to $55.00 on orders with 2 or more items
Rest of the world
Express Shipping is discounted to $55.00 on orders with 2 or more items
|
||
| Registered Shipping | $10.00 / 7 days | $10.00 / 21 days |
|
Thailand
Registered Shipping is discounted to $10.00 on orders with 2 or more items
Rest of the world
Registered Shipping is discounted to $10.00 on orders with 2 or more items
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PositiveGem arrived quickly and description was perfect.
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