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Scheelite 3.91ct Ultra Rare Collector Stone SKU 1
- SKU
- Dimensions (mm)
- 7.950 x 7.370 x 4.740mm
- Weight (cts)
- 3.910
- Treatment
- No Treatment
- Shape
- Cushion
- Colours
-
Scheelite, named for Swedish chemist C.W. Scheele is a calcium tungstate, a major source of tungsten. Most scheelite is fluorescent and ranges from blue to white in color. Spectacular, transparent crystals come from Austria, Italy, Brazil, Rwanda, and Colorado. Scheelite crystals often have high luster and fire that is almost adamantine.
Hardness
4.5-5
Streak
White
Specific Gravity
5.900-6.120 Typical:6.000
Toughness
Poor
Luster
SubAdamantine, Vitreous
Fracture
Uneven, Subconchoidal, Irregular
Cleavage
Good, in one direction, Poor, in one direction
Transparency
Transparent
Dispersion
Strength: Moderate Fire Value: 0.038
Refractive Index
Over The Limit 1.918-1.938 Tolerance: (+0.003/-0.003)
Birefringence
0.016- 0.017
Optic Character
Uniaxial
Optic Sign
Positive
Polariscope Reaction
Doubly Refractive (DR)
Fluorescence
SWUV: Inert to strong light blue or yellow
LWUV: Inert
Pleochroism
Unobservable
Feel free to “make an offer” on our other items :)
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- SKU
- Dimensions (mm)
- 7.950 x 7.370 x 4.740 mm
- Weight (cts)
- 3.910
- Treatment
- No Treatment
- Shape
- Cushion
- Colours
-
Scheelite, named for Swedish chemist C.W. Scheele is a calcium tungstate, a major source of tungsten. Most scheelite is fluorescent and ranges from blue to white in color. Spectacular, transparent crystals come from Austria, Italy, Brazil, Rwanda, and Colorado. Scheelite crystals often have high luster and fire that is almost adamantine.
Hardness
4.5-5
Streak
White
Specific Gravity
5.900-6.120 Typical:6.000
Toughness
Poor
Luster
SubAdamantine, Vitreous
Fracture
Uneven, Subconchoidal, Irregular
Cleavage
Good, in one direction, Poor, in one direction
Transparency
Transparent
Dispersion
Strength: Moderate Fire Value: 0.038
Refractive Index
Over The Limit 1.918-1.938 Tolerance: (+0.003/-0.003)
Birefringence
0.016- 0.017
Optic Character
Uniaxial
Optic Sign
Positive
Polariscope Reaction
Doubly Refractive (DR)
Fluorescence
SWUV: Inert to strong light blue or yellow
LWUV: Inert
Pleochroism
Unobservable
Feel free to “make an offer” on our other items :)
We Accept Payments 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
|
||
| Express Shipping | $55.00 / 2 days | $55.00 / 5 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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PositiveI received the stone safely. Thank you for always making beautiful stones available for purchase.
-
Positive
Nice stone, fast shipping, would buy again.
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