すべての写真を見る (7)
5.24 CTS CERTIFIED RARE COLLECTOR GEM - BASTNASITE [BSBr4]
- SKU
- 寸法(mm)
- 10.200 x 8.500 x 4.950mm
- 重さ (CT)
- 5.240
- Certified Gemstones
- はい
- タイプ
- Faceted
- 色
-
BASTNASITE
Within the last few years, the locality at Zagi Mountain in Pakistan has provided collectors with some of the finest quality and amazingly gemmy Bastnasite specimens. Typically the species forms in relatively thin blades and was never suitable enough for cutting stones. The new find in Pakistan has produced some very thick crystals for the species, many of which are of gem quality. The stones cut from some of these crystals are extremely rare and highly prized by collectors. They often have some sort of inclusions, and completely eye clean gems are very hard to find. This particular stone is a beautiful, golden orange color gem with a great cut. The stone is only very very slightly included, which is quite impressive for a stone this size. This stone would fill a spot in any rare gem collection, and it appears that the locality might be dwindling as less and less Bastnsite comes out each year.
Mohs scale 4 to 4.5
Grading VS
weight 5.24 cts app
size 10.20 x 8.50 x 4.95 mm app
Bastnäsite gets its name from its type locality, the Bastnäs Mine, Riddarhyttan, Västmanland, Sweden. Ore from the Bastnäs Mine led to the discovery of several new minerals and chemical elements by Swedish scientists such as Jöns Jakob Berzelius, Wilhelm Hisinger and Carl Gustav Mosander. Among these are the chemical elements cerium, which was described by Hisinger in 1803, and lanthanum in 1839. Hisinger, who was also the owner of the Bastnäs mine, chose to name one of the new minerals bastnäsit when it was first described by him in 1838.
Type 1 Gemstones |
The following gemstones are typically inclusion free, even minor inclusions detract from their value. |
Diamond, Amethyst, Beryls(Aquamarine,Morganite), Citrine, Smoky Quartz, topaz, Chrysoberyl, Kunzite, Tanzanite, green Tourmaline, and Blue Zircon |
IF | Internally flawless under extreme magnification (Very rare) |
F | Flawless |
VVS | Minute inclusions under 10x; invisible to the unaided eye |
VS | Minor inclusions under 10x; usually invisible to the unaided eye |
SI1 | Noticeable inclusions under 10x; usually visible to the unaided eye |
SI2 | Noticeable inclusions under 10x; usually quite visible to the unaided eye |
I1 | prominent- moderate affect on appearance or durability |
I2 | prominent - severe affect on appearance or durability |
I3 | prominent- severe affect on beauty, transparency or durability |
Type 2 Gemstones |
Gemstones that normally have small inclusions that do not detract from value. |
Alexandrite, Andalusite, Iolite, Peridot, Rhodolite, Ruby, Sapphire, Spinel, Tourmaline, Garnet, Amethyst, Red Zircon, Tsavorite; Blue, Orange, Purple, Fluorite.Yellow and Parti-colored Tourmaline |
F | Flawless |
VVS | Minor inclusions under 10x; usually invisible to the unaided eye |
VS | Noticeable inclusions under 10x; often invisible to the unaided eye |
SI1 | Obvious inclusions under 10x; visible to the unaided eye |
SI2 | Obvious inclusions under 10x; very apparent to the unaided eye |
I1 | prominent - moderate affect on appearance or durability |
I2 | prominent - severe affect on appearance or durability |
I3 | prominent - severe affect on beauty, transparency or durability |
6 mm = 1/4 inch (Approx)
- SKU
- 寸法(mm)
- 10.200 x 8.500 x 4.950 mm
- 重さ (CT)
- 5.240
- Certified Gemstones
- はい
- タイプ
- Faceted
- 色
-
BASTNASITE
Within the last few years, the locality at Zagi Mountain in Pakistan has provided collectors with some of the finest quality and amazingly gemmy Bastnasite specimens. Typically the species forms in relatively thin blades and was never suitable enough for cutting stones. The new find in Pakistan has produced some very thick crystals for the species, many of which are of gem quality. The stones cut from some of these crystals are extremely rare and highly prized by collectors. They often have some sort of inclusions, and completely eye clean gems are very hard to find. This particular stone is a beautiful, golden orange color gem with a great cut. The stone is only very very slightly included, which is quite impressive for a stone this size. This stone would fill a spot in any rare gem collection, and it appears that the locality might be dwindling as less and less Bastnsite comes out each year.
Mohs scale 4 to 4.5
Grading VS
weight 5.24 cts app
size 10.20 x 8.50 x 4.95 mm app
Bastnäsite gets its name from its type locality, the Bastnäs Mine, Riddarhyttan, Västmanland, Sweden. Ore from the Bastnäs Mine led to the discovery of several new minerals and chemical elements by Swedish scientists such as Jöns Jakob Berzelius, Wilhelm Hisinger and Carl Gustav Mosander. Among these are the chemical elements cerium, which was described by Hisinger in 1803, and lanthanum in 1839. Hisinger, who was also the owner of the Bastnäs mine, chose to name one of the new minerals bastnäsit when it was first described by him in 1838.
Type 1 Gemstones |
The following gemstones are typically inclusion free, even minor inclusions detract from their value. |
Diamond, Amethyst, Beryls(Aquamarine,Morganite), Citrine, Smoky Quartz, topaz, Chrysoberyl, Kunzite, Tanzanite, green Tourmaline, and Blue Zircon |
IF | Internally flawless under extreme magnification (Very rare) |
F | Flawless |
VVS | Minute inclusions under 10x; invisible to the unaided eye |
VS | Minor inclusions under 10x; usually invisible to the unaided eye |
SI1 | Noticeable inclusions under 10x; usually visible to the unaided eye |
SI2 | Noticeable inclusions under 10x; usually quite visible to the unaided eye |
I1 | prominent- moderate affect on appearance or durability |
I2 | prominent - severe affect on appearance or durability |
I3 | prominent- severe affect on beauty, transparency or durability |
Type 2 Gemstones |
Gemstones that normally have small inclusions that do not detract from value. |
Alexandrite, Andalusite, Iolite, Peridot, Rhodolite, Ruby, Sapphire, Spinel, Tourmaline, Garnet, Amethyst, Red Zircon, Tsavorite; Blue, Orange, Purple, Fluorite.Yellow and Parti-colored Tourmaline |
F | Flawless |
VVS | Minor inclusions under 10x; usually invisible to the unaided eye |
VS | Noticeable inclusions under 10x; often invisible to the unaided eye |
SI1 | Obvious inclusions under 10x; visible to the unaided eye |
SI2 | Obvious inclusions under 10x; very apparent to the unaided eye |
I1 | prominent - moderate affect on appearance or durability |
I2 | prominent - severe affect on appearance or durability |
I3 | prominent - severe affect on beauty, transparency or durability |
6 mm = 1/4 inch (Approx)
配送業者 | 発送先:国 | その他の国への配送 |
---|---|---|
FedEx | $12.00 / :日日 | $39.00 / :日日 |
:国
:数量以上のアイテムを含む注文では、:プロバイダーは $12.00 に割引されます
世界のその他の地域
:数量以上のアイテムを含む注文では、:プロバイダーは $39.00 に割引されます
|
||
Registered Shipping | $9.00 / :日日 | $16.00 / :日日 |
:国
:数量以上のアイテムを含む注文では、:プロバイダーは $9.00 に割引されます
世界のその他の地域
:数量以上のアイテムを含む注文では、:プロバイダーは $16.00 に割引されます
|
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ポジティブ
Great and clear sapphire, beautiful cut ! Great packaging
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ポジティブ
AAAA+++ Very Happy! Just like the pic.
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ポジティブ
AAAA+++ Very Happy! Just like the pic.
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ポジティブ
Beautiful