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$1,250.00 USD
Prezzo consigliato al pubblico $4,000.00
2960
6

28000.00 CTS LABODORITE GEM SPECIMEN 'MIDNIGHT'[SGA4]SHOP

SKU
Dimensioni (mm)
245.000 x 150.000 x 70.000mm
Peso (cts)
28000.000
Tipo
Specimen
Colori

 

 LAPRADORITE SPECIMEN
GEM GRADE FROM MADAGASCAR.

ELECTRIC MIDNINGHT
Natural stone that has been hand polished and waxed added to get a fine luster.
Great specimen piece.
The weight and size is app

 

 

 

 

Labradorite is truly a fascinatingly beautiful mineral which reminds me of black opal. Its a mineral whose charm is not fully noticed and may be overlooked if not viewed from the proper position. Generally a dull, dark looking mineral with no special virtue until the colorful shiller is observed glowing on the surface. Labradorite can produce a colorful play of light across cleavage planes and in sliced sections called labradorescence. The usually intense colors range from the typical blues and violets through greens, yellows and oranges. Some rare specimens display all these colors simultaneously. 


Note the reflection you see is from the light we used to take the picture.

 

The color display is from lamellar intergrowths inside the crystal. These intergrowths result from compatible chemistries at high temperatures becoming incompatible at lower temperatures and thus a separating and layering of these two phases. The resulting color effect is caused by a ray of light entering a layer and being refracted back and forth by deeper layers. This refracted ray is slowed by the extra travel through the layers and mixes with other rays to produce a light ray coming out that has a different wavelength than when it went in. The wavelength could correspond to the wavelength of a particular color, such as blue. The effect depends on the thickness and orientation of the layers. If the layers are too thick or too thin no color shiller is seen. Also if the viewer does not observe from the precise angle or if light is not supplied from the proper angle then no color shiller is seen. The labradorescence is truly a one of a kind mineralogical experience and must be observed in person in order to truly appreciate its beauty.

Labradorite is a member of the plagioclase series of minerals. The plagioclase series comprises felspars that range in chemical composition from pure NaAlSi3 O8 to pure CaAl2 Si2 O8 . Labradorite is defined at approximately the 50% to 70% CaAl2 Si2 O8 . Labradorite by definition must contain 50-70% calcium to 50-30% sodium in the sodium/calcium position of the crystal structure. All members of the plagioclase series usually display lamellar twinning called "Albite Twinning". The twinning is caused by a error in the crystal structure during its growth.

 

 

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FedEx $12.00 / 3 giorni $39.00 / 10 giorni
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Resto del mondo
FedEx è scontato a $39.00 sugli ordini con 2 o più articoli
Registered Shipping $9.00 / 7 giorni $16.00 / 21 giorni
Australia
Registered Shipping è scontato a $9.00 sugli ordini con 2 o più articoli
Resto del mondo
Registered Shipping è scontato a $16.00 sugli ordini con 2 o più articoli

sedagems
Hi Welcome to the Sedagems store, Run by Paul Sedawie and specializing in Australian sapphires and gems stones he has collected on his many buying trips world wide. All stock has a money back guarantee as your continued business is our business.
Mermaid Waters , Australia
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19038 feedback

  • ryumaru
    ryumaru
    Positivo

    Beautiful ametrine. Very fast delivery. Professional seller

  • kewpie
    kewpie
    Positivo

    Really beautiful piece. Very happy

  • laurahawkmoth
    laurahawkmoth
    Positivo

    Amazing, beautiful & mysterious impactite

  • laurahawkmoth
    laurahawkmoth
    Positivo

    amazing inner life & iridescence -- lovely

  • kewpie
    kewpie
    Positivo

    this is SUCH a nice piece - they have a lifetime customer - great customer service and communication - THANK YOU

5%
Codice coupon SEDADEALS
Valido fino a
2nd Jan 2025

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Il programma Gemstone Sheriff consente ai nostri membri di richiedere un controllo su qualsiasi prodotto, che viene completato da un Gemologist indipendente che valuta l'accuratezza della descrizione e delle immagini dell'articolo.

Dettagli di spedizione

Spedizione:
$16.00 21 giorni tramite Registered Shipping
Spedizioni da:
Australia

Opzioni di pagamento

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

Panoramica

Tipo di elenco : Standard
Codice prodotto : 1226384
Inizia : 21st November 2024 04:06 pm PST
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