11,55 cts rare énorme feu clignotant naturel coupé poire faible jaune VVS scapolit

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Vendeur: captej2012 ✉️ (874) 100%, Lieu où se trouve: Canyon Country, California, US, Lieu de livraison: WORLDWIDE et de nombreux autres pays, Numéro de l'objet: 281778718226 11,55 cts rare énorme feu clignotant naturel coupé poire faible jaune VVS scapolit.

11.55 cts Rare Huge Natural Pear-cut FlashingFire Faint-Yellow VVS Scapolite

New without Tags.  This gem has never been used/placed/set in a setting.  It is utterly undamaged, unmarred and in perfect condition as expected of NWOTags.

I have included two Scapolite articles below for your appreciation and enjoyment.

Summary from below:  "Scapolite is a rare gemstone that is named after the Greek word, "skapos" meaning stick or stem, due to the long columnar formation of its crystals. The most common colour of scapolite is honey yellow, but it can also be violet, orange, pink, brown, grey or colourless. Its brilliance and vitreous lustre make it a desirable gemstone and collector's item. "   ...   "Fine gemstone quality scapolite is extremely rare and is sought after by gem and mineral collectors. Due to the rarity of transparent gem quality material, scapolite is considered to be one of the 'lesser-known' gemstones. It also lacks the hardness and durability for most mainstream jewellery use, so it is classified as a collector's stone."   ...   "Scapolite is not typically treated or enhanced in any way, but some lavender coloured stones have been known to be heat treated or irradiated."

Type:  Natural Scapolite   (personally confirmed as Natural Scapolite by digital refractometer (RI=1.568), dichroscope (dichroic), polariscope (flashes in rotation), spectroscope, long&short-wave UV light (weakly tenebrescent), measure Specific Gravity=2.66) -- captej2012 Color:  Faintly-Yellow Shape:  Pear-cut Dimensions:  17.93mm x 12.78mm x 9.17mm Weight:  11.55 cts Luster:  Excellent with Dazzling Dispersion Clarity:  VVS Hardness:  5.5-6.0 rating on the Mohs Scale Treatment:  Not Heated, Not Enhanced, Not Treated Origin:  Africa

Tennison the Friendly Ghost says

"I am Barely visible in Visible Light,

And Ghostly Blue in Invisible UV Light.

So you can also call me Tenebrescent."

We are an eBay eStore enterprise focused on selling mostly Loose Natural Gemstones.  Stay here, look around and learn.  Via eBay Messaging, ask us questions, make an offer, and otherwise discuss your wishes, concerns and hopes.  We pride ourselves as good-spirited folks having fun and doing our best to share the joy of Nature's most beautiful and enduring literal treasure -- Natural Gemstones.  Expect to find us cheerful and trustworthy, and we will expect the same of you.  For us, Negative FeedBack as a means of coercion is never needed and only degrades everyone's enjoyment in what should otherwise be a fun shopping experience.          And finally, please enjoy my work as eBay's First (unofficial) Gemstone Poet.  --  captej2012

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Scapolite Gemstone Information About Scapolite - History and Introduction

Scapolite is a rare gemstone that is named after the Greek word, "skapos" meaning stick or stem, due to the long columnar formation of its crystals. The most common colour of scapolite is honey yellow, but it can also be violet, orange, pink, brown, grey or colourless. Its brilliance and vitreous lustre make it a desirable gemstone and collector's item. Scapolite is also referred to as "wernerite", after its discoverer. Other pseudonyms for scapolite are mizzonite, dipyre, marialite and meionite.

Fine gemstone quality scapolite is extremely rare and is sought after by gem and mineral collectors. Due to the rarity of transparent gem quality material, scapolite is considered to be one of the 'lesser-known' gemstones. It also lacks the hardness and durability for most mainstream jewellery use, so it is classified as a collector's stone. On rare occasion, scapolite can exhibit 'cat's eye' or chatoyancy effects. Cat's eye scapolite is exceptionally rare and very valuable.

Scapolite was first discovered in Northern Burma (Myanmar) in 1913, in the form of fibrous white, pink and violet crystals. In 1920, yellow scapolite was discovered in Madagascar and ten years later in Brazil. These discoveries were followed by more in Mozambique, Kenya and Tanzania. A purple variety of scapolite from Tanzania, discovered in 1975 is called petschite.

 

Yellow Scapolite Gemstone
Identifying Scapolite

Scapolite is often confused with golden topaz, golden beryl, chrysoberyl and tourmaline, but these gem types are much harder than scapolite. Scapolite can often be easily identified through simple testing for hardness. Cat's eye scapolite has very distinct and clear 'eyes', which can be helpful when trying to identify it from other chatoyant gemstones. Scapolite is closely related to diopside and chrysolite, also known as olivine or peridot. Distinguishing these materials requires advanced testing methods, such as testing for fluorescence, composition, specific gravity, refractive indices and crystal structure.

 

Scapolite; Origin and Gemstone Sources

Gem quality scapolite is extremely rare, but it can be found in a number of locations around the world. Tanzania is thought to produce the highest quality material. Other notable sources include Brazil, Burma (Myanmar), Canada, Italy, Kenya, Madagascar, Mexico, Namibia, Norway and the USA. Canada is known for a mottled variety of scapolite, closely associated with diopside. Although it is an opaque material, the mottled pattern makes an interesting gemstone when cut en cabochon.

Buying Scapolite and Determining Scapolite Gemstone Value

Scapolite Colour

The most common colour of scapolite is honey yellow, but it is available in other colours such as orange, violet, pink, brown, grey and colourless. Cat's eye scapolite often occurs in greenish, brown and grey. Bright purple scapolite is considered to be the most valuable. Scapolite stones with high colour intensity are the most desirable.

Scapolite Clarity and Lustre

Scapolite is transparent to translucent and typically occurs with excellent transparency. Inclusions are quite common, especially in larger specimens. All scapolite gemstones exhibit a vitreous lustre when cut and polished. Some translucent scapolite gemstones have inclusions that result in chatoyancy (cat's eye effect). These cat's eye scapolite gemstones are rare and extremely desirable because they exhibit a clear and sharp chatoyancy. In gemstones where the chatoyancy is indistinct, they may exhibit adularescence , (a soft white glow).

Scapolite Cut and Shape

Scapolite is typically faceted in a variety of shapes and cut styles, including oval, round, cushion, rectangular, trillion, pear and other fancy shapes. Calibrated sizes can demand high premiums. Scapolite is often found in very large sizes. In fact, most scapolite gemstones are over 6 carats in weight. Translucent materials are typically cut en cabochon to maximize their chatoyancy.

Scapolite Treatment

Scapolite is not typically treated or enhanced in any way, but some lavender coloured stones have been known to be heat treated or irradiated. Irradiated scapolite usually begins as a yellow gemstone and results in a lavender colour, though naturally violet scapolite is also available. Treated scapolite stones are known to fade with exposure to heat and light. Natural purple scapolite does not fade in colour.

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Scapolite Gems

Yellow Scapolite

Scapolite  is one of the lesser-known gemstones and is not widely available. You're unlikely to find it in your local jewelry store. Nonetheless, it's a desirable and attractive gem for both jewelers and collectors, with good brilliance and a vitreous luster . Cat's eye scapolite  is also found occasionally and is sought after by collectors. Scapolite is not a particularly hard stone, however, with a rating of 5.5 to 6 on the Mohs scale . So it is best used for pendants, earrings and brooches.

Scapolite  was first discovered in 1913 in the Mogok Stone Tract in upper Burma. It comes in an interesting variety of colors, including white, colorless, greenish, gray, yellow, brown, reddish and pink. There is also a lavender variety of scapolite that is produced by heat treatment . The other colors are typically untreated. The most common color for scapolite gemstones is bright honey-yellow.

Cat's Eye Scapolite

Scapolite, which is Greek for "rod" or "shaft," is commonly found long columnar crystals, hence the name. Its crystals are tetragonal so it will commonly have a square or octahedral cross-section. Scapolite has a density  of 2.57 to 2.74 and a refractive index  of 1.540 to 1.579.

Scapolite, which is sodium calcium aluminum silicate, has a rather complex chemical composition. Scapolite is actually the name of a series of minerals between the sodium chloride rich mineral called marialite and the calcium carbonate rich mineral, meionite. Distinguishing the scapolite minerals from each other can be difficult. Types of scapolite differ only slightly in density and refractive index, and both density and refractive index increase along with the calcium content. It is because of this closeness in properties and yet seemingly different chemistries that scapolite has had its share of pseudonyms, the most common being wernerite (named for its discoverer). Scapolite has also been known as mizzonite, dipyre, marialite and meionite.

Yellow Scapolite

Gemstone-quality scapolite usually exhibits excellent transparency. Some of the less transparent material exhibits chatoyancy  (the cat's eye effect) when cut ascabochons . Cat's eye stones are rather rare and desirable as they tend to have exceptionally sharp eyes.

Scapolite is found in a number of locations around the world, including Canada, the USA, Norway, Italy and Mexico. Gemstone sources are found in Brazil, Madagascar, Tanzania, Kenya, Canada and Burma.

  • Condition: Neuf sans emballage
  • Condition: Scapolite is a rare gemstone that is named after the Greek word, "skapos" meaning stick or stem, due to the long columnar formation of its crystals. The most common colour of scapolite is honey yellow, but it can also be violet, orange, pink, brown, grey or colourless. Its brilliance and vitreous lustre make it a desirable gemstone and collector's item. " ... "Fine gemstone quality scapolite is extremely rare and is sought after by gem and mineral collectors. Due to the rarity of transparent gem quality material, scapolite is considered to be one of the 'lesser-known' gemstones. It also lacks the hardness and durability for most mainstream jewellery use, so it is classified as a collector's stone." ... "Scapolite is not typically treated or enhanced in any way, but some lavender coloured stones have been known to be heat treated or irradiated.
  • Transparency: VVS
  • Total Carat Weight (TCW): 11.55 cts
  • Shape: Pear
  • Gemstone: Scapolite
  • Length: 17.93mm
  • Width: 12.78mm
  • Origin: Africa
  • Depth: 9.17mm
  • Treatment: Not Heated
  • Natural/Lab-Created: Natural
  • Color: Faint-Yellow

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