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3439
3

5.24 CTS CERTIFIED RARE COLLECTOR GEM - BASTNASITE [BSBr4]

SKU
Dimensioni (mm)
10.200 x 8.500 x 4.950mm
Peso (cts)
5.240
Certified Gemstones
Tipo
Faceted
Colori

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)

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sedagems
MEMBER OF THE  [ICA] INTERNATIONAL COLOURED STONE ASSOCAITION AND PRESIDENT OF THE OPAL ASSOCIATION. PAUL SEDAWIE IS A FORMER OPAL MINER WHO NOW TRAVELS AROUND AUSTRALIA AND THE WORLD COLLECTION RARE AND INTERESTING GEMS TONES AND FOSSILS.ALL STOCK HAS A MONEY BACK GUARANTEE We have a retail shop/museum at the Gold Coast Opal and Gem Centre 25 surfers av mermaid waters Qld Australia .4218 open mon to sat 10 to 5
:città, :paese
Verificato
: Feedback totale

  • sifei
    sifei
    Positivo

    this stone looks exactly as shown on photos and matches the description. The luster is excellent, and the stone is very well cut, superb colour, fast shipping. I would definitely buy again from this seller.

  • claire8120
    claire8120
    Positivo

    Great stone, thank you

  • claire8120
    claire8120
    Positivo

    Great stone, thank you

  • dew1947
    dew1947
    Positivo

    great gem and fast service

  • wazzamac
    wazzamac
    Positivo

    Great seller, quality product, pleasure doing business!

7.00%
Codice coupon GEMSONSALE
Valido fino a
15th Mar 2024

Verifica

Il programma Gemstone Sheriff consente ai nostri membri di richiedere un audit su qualsiasi prodotto, che è completato da una :qualificazione indipendente che valuta l'accuratezza della descrizione e delle immagini dell'articolo.

Dettagli di spedizione

Spedizione:
$16.00 :conta i giorni tramite Registered Shipping
Spedizioni da:
Australia

Opzioni di pagamento

  • paypal
  • stripe
Questo venditore aggiunge 10.00% tax alle transazioni in Australia.

Panoramica

Tipo di elenco : Standard
Codice prodotto : 1048145
Inizia : 16th February 2024 06:12 pm PST
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