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Zatvoreno
30/08/2022 01:28 am

GiL Certified 1.27 ct Tanzanian Sphene S.2

SKU
Dimenzije (mm)
7.480 x 5.700 x 3.660mm
Težina (cts)
1.270
Certified Gemstones
Da
Treatment
No Treatment
Tip
Faceted
Boje

General Info:

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 silicate
  • Chemical Formula: CaTiSiO5
  • Synthesis
  • Crystal System: Monoclinic
  • Classification Silicate
  • Nature Natural
  • Crystallinity 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:

  • ORIGIN TANZANIA
  • TREATMENT NONE 100% NATURAL
  • COLOR GREEN MULTICOLOR SPARKLE

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naturalspectragems
naturalspectragems
Natural Spectra Gems PTY LTD [NSG] a has been operating from Australia, Pakistan and Thailand for the last 11 years, wholesaling semi precious and precious gemstones both in cut/polished as well as rough/specimen, exclusively sourced from around the world and especially from Pakistan, Tajikstan, Afghanistan and Kashmir to which, as you would be aware, access is somewhat limited. Because of my ties to these important mining and market environs, the stones I source are of "high to finest" quality at very attractive prices. Please return the item if for some reasons you do not like the item. After one week we will not accept the return. Please follow our new arrivals on http://naturalspectragems.tumblr.com/ https://www.facebook.com/nsgems https://plus.google.com/NaturalSpectraGems
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Detalji dostave

dostava:
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Brodovi iz:
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Pregled

Vrsta unosa : Standard
Identifikacijski broj proizvoda : 635110
Počinje : 21st August 2022 11:15 am PDT
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