750 Carats Natural Rough Sphene Parcel

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詳細

SKU
寸法(mm): 1 x 1 x 1mm
重さ (CT): 750
Treatment: No Treatment
Type: Rough, Specimen
色

説明

A brilliantly transparent gem, sphene has fire greater than that of diamond! This gem is named from the Greek word for “wedge,” as its crystals are typically wedge shaped, but may be referred to by its mineral name, titanite. Another characteristic sphene possesses is birefringence, or double refraction, meaning that light splits into two rays as it passes through the gem. As a result, the back facets appear as double images, giving the gem a soft, hazy appearance, similar to the doubling seen in zircon.

Classification

Common Name: Sphene
Species Sphene
Variety
Colors Yellow, Green, Brown, Orange, Red
Alternate Names: Titanite, Chrome Sphene
Gemstone Groups
Key Separations: OTL RI reading, very strong eye visible doubling, possibly spectra
Comments Chrome sphene is intense green in color.

Sphene Chemistry and Crystallography:

Chemical Name: Calcium titanium silicateChemical Formula: CaTiSiO5SynthesisCrystal System: MonoclinicClassification SilicateNature NaturalCrystallinity Crystalline

Sphene Physical properties:

Hardness 5-5.5
Streak White
Specific Gravity: 3.5-3.54 Typical:3.52
Toughness Varies
Inclusions Sphene occasionally contain tiny crystals that aline in straight rows or “feathers”, natural inclusions, actinolite needles and twinning is common. Stones have strong dispersion and eye-visible doubling.
Luster SubAdamantine
Stability
Fracture Conchoidal, Splintery
Cleavage Good, in one direction

Item Specifics:

TREATMENT NONE 100% NATURAL
COLOR GREEN MULTICOLOR SPARKLE

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FedEx	アメリカ合衆国 8	最初のアイテム追加アイテムごとに送料上限
Registered Shipping	アメリカ合衆国 21	最初のアイテム追加アイテムごとに送料上限
DHL	パキスタン 12	最初のアイテム追加アイテムごとに送料上限
FedEx	パキスタン 8	最初のアイテム追加アイテムごとに送料上限
Standard Shipping - Tracked	パキスタン 23	最初のアイテム追加アイテムごとに送料上限

詳細

SKU
寸法(mm): 1 x 1 x 1 mm
重さ (CT): 750
Treatment: No Treatment
Type: Rough, Specimen
色

説明