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Grandidierite, 5.3ct, rare gem in no reserve!
- SKU
- Abck4
- Dimensiones (mm)
- 13.000 x 10.300 x 5.900mm
- Peso (cts)
- 5.300
- Treatment
- No Treatment
- Shape
- Oval
- Tipo
- Faceted
- Clarity
- SI
- Colores
-
Grandidierite is a mineral that was first discovered in 1902 in southern Madagascar. The mineral was named in honor of French explorer Alfred Grandidier (1836–1912) who studied the natural history of Madagascar.
A rather rare mineral, blue-green grandidierite is seldom seen in gem or jewelry collections. Translucent material is sometimes cut into cabochons. Faceted pieces are rare. As cabochons, translucent grandidierite can range from 1 to 10 carats and up to about one inch in size. Most material is generally opaque.[citation needed]
Since its discovery in 1902, most grandidierite used as a gem has been translucent. Recent discoveries of transparent material in Sri Lanka (around 2000) and a new deposit in Madagascar (2014) have resulted in faceted gemstones.
Grandidierites appear bluer in color the more iron (Fe) they contain. A recently discovered gemstone, blue ominelite is the Fe-analogue (Fe, Mg) to grandidierite (Mg, Fe).
Grandidierites display strong trichroic pleochroism. That means they can show three different colors depending on the viewing angle: dark blue-green, colorless (sometimes a very light yellow), or dark green.
While trichroism can usually help distinguish grandidierites from other gems, lazulites can occur with blue-green colors and show colorless/blue/dark blue pleochroism. They also appear cabbed and, more rarely, faceted. Nevertheless, lazulites have somewhat higher refractive indices and specific gravity. Grandidierites also have greater hardness.
Shipping: For special requests such as express delivery please contact me. For lost stones the seller is not liable, therefore an additional insurance is recommended. Right of return within two weeks after receiving the shipment. Payment via PayPal, Credit Card, or Bank transfer is possible. For the shipping I generally use: Austrian Post or FedEx. Unfortunately from Austria only DHL "express" is possible.
Please pay your stones in between 48 hours or contact me. Otherwise I need to cancel the deal.
If there is anything you shouldn't be satisfied with please just let me now and we will find a way to solve every problem. My aim is to make you happy with beautiful stones of good quality, good communication is the easiest way to find a solution!
- SKU
- Abck4
- Dimensiones (mm)
- 13.000 x 10.300 x 5.900 mm
- Peso (cts)
- 5.300
- Treatment
- No Treatment
- Shape
- Oval
- Tipo
- Faceted
- Clarity
- SI
- Colores
-
Grandidierite is a mineral that was first discovered in 1902 in southern Madagascar. The mineral was named in honor of French explorer Alfred Grandidier (1836–1912) who studied the natural history of Madagascar.
A rather rare mineral, blue-green grandidierite is seldom seen in gem or jewelry collections. Translucent material is sometimes cut into cabochons. Faceted pieces are rare. As cabochons, translucent grandidierite can range from 1 to 10 carats and up to about one inch in size. Most material is generally opaque.[citation needed]
Since its discovery in 1902, most grandidierite used as a gem has been translucent. Recent discoveries of transparent material in Sri Lanka (around 2000) and a new deposit in Madagascar (2014) have resulted in faceted gemstones.
Grandidierites appear bluer in color the more iron (Fe) they contain. A recently discovered gemstone, blue ominelite is the Fe-analogue (Fe, Mg) to grandidierite (Mg, Fe).
Grandidierites display strong trichroic pleochroism. That means they can show three different colors depending on the viewing angle: dark blue-green, colorless (sometimes a very light yellow), or dark green.
While trichroism can usually help distinguish grandidierites from other gems, lazulites can occur with blue-green colors and show colorless/blue/dark blue pleochroism. They also appear cabbed and, more rarely, faceted. Nevertheless, lazulites have somewhat higher refractive indices and specific gravity. Grandidierites also have greater hardness.
Shipping: For special requests such as express delivery please contact me. For lost stones the seller is not liable, therefore an additional insurance is recommended. Right of return within two weeks after receiving the shipment. Payment via PayPal, Credit Card, or Bank transfer is possible. For the shipping I generally use: Austrian Post or FedEx. Unfortunately from Austria only DHL "express" is possible.
Please pay your stones in between 48 hours or contact me. Otherwise I need to cancel the deal.
If there is anything you shouldn't be satisfied with please just let me now and we will find a way to solve every problem. My aim is to make you happy with beautiful stones of good quality, good communication is the easiest way to find a solution!
Proveedor de envío | Envío a: país | Envíos al resto del mundo |
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Standard Shipping - Tracked | $12.00 / :días días | $16.00 / :días días |
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:proveedor tiene un descuento de $15.00 en pedidos con 3 o más artículos
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FedEx | $27.00 / :días días | $46.00 / :días días |
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:proveedor tiene un descuento de $26.00 en pedidos con 2 o más artículos
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:proveedor tiene un descuento de $45.00 en pedidos con 2 o más artículos
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Express Shipping | $36.00 / :días días | $75.00 / :días días |
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:proveedor tiene un descuento de $40.00 en pedidos con 3 o más artículos
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:proveedor tiene un descuento de $65.00 en pedidos con 3 o más artículos
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Registered Shipping | $9.00 / :días días | $16.00 / :días días |
:país
:proveedor tiene un descuento de $15.00 en pedidos con 3 o más artículos
Resto del mundo
:proveedor tiene un descuento de $15.00 en pedidos con 3 o más artículos
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Standard Shipping - Untracked | $5.00 / :días días | $13.00 / :días días |
:país
:proveedor tiene un descuento de $15.00 en pedidos con 3 o más artículos
Resto del mundo
:proveedor tiene un descuento de $13.00 en pedidos con 3 o más artículos
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![stonehengejpd](https://liveplatforms-production.b-cdn.net/tenants/gr/uploads/sellers/215146/aa5cc8c9-93b2-4a02-ba1b-828a8728181e.jpg)
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Positivo
Somehow grandidierites are one of my favorites. Thanks for this goodlooking one. Great seller & store!
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Positivo
Really beautiful stone. I'm happy with my purchase.
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Positivo
This one is special for sure going to make a treasured family heirloom! Never disappointed with your stones or service. Always a pleasure!
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Positivo
Another beautiful stone that surpassed even my expectations ! Always a pleasure to do business with you!
¿Por qué los usuarios se superan a sí mismos?
Cuando se realiza una oferta, esta es la cantidad máxima que un usuario está dispuesto a ofertar por el producto. Luego, nuestro sistema ofertará automáticamente en nombre de ese usuario, aumentando gradualmente la oferta para mantener su posición como el mejor postor, hasta el máximo especificado.
Cuando hay un ícono que indica "Oferta automática", significa que nuestro sistema está realizando ofertas activamente para el usuario en función de su oferta máxima. Esto puede parecer como si los usuarios se estuvieran superando a sí mismos, pero es simplemente el resultado de que el sistema actualiza la oferta para reflejar el límite máximo de los usuarios.