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$58.00 USD
Prix

Grandidierite, 4.25ct, perfect blue gem from Madagascar!

1016
3

UGS
Ax3
Dimensions (mm)
12.800 x 8.800 x 5.400mm
Poids (cts)
4.250
Treatment
No Treatment
Shape
Oval
Taper
Faceted
Clarity
SI
Couleurs

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!



Fournisseur d'expédition Expédition vers Austria Expédition dans le reste du monde
Standard Shipping - Tracked $12.00 / 3 $16.00 / 21
Austria
Standard Shipping - Tracked bénéficie d'une remise de $15.00 sur les commandes contenant 3 ou plus d'articles
Reste du monde
Standard Shipping - Tracked bénéficie d'une remise de $17.00 sur les commandes contenant 3 ou plus d'articles
FedEx $27.00 / 2 $46.00 / 5
Austria
FedEx bénéficie d'une remise de $26.00 sur les commandes contenant 2 ou plus d'articles
Reste du monde
FedEx bénéficie d'une remise de $45.00 sur les commandes contenant 2 ou plus d'articles
Express Shipping $36.00 / 2 $75.00 / 5
Austria
Express Shipping bénéficie d'une remise de $40.00 sur les commandes contenant 3 ou plus d'articles
Reste du monde
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Registered Shipping $9.00 / 7 $16.00 / 21
Austria
Registered Shipping bénéficie d'une remise de $15.00 sur les commandes contenant 3 ou plus d'articles
Reste du monde
Registered Shipping bénéficie d'une remise de $15.00 sur les commandes contenant 3 ou plus d'articles
Standard Shipping - Untracked $5.00 / 3 $13.00 / 28
Austria
Standard Shipping - Untracked bénéficie d'une remise de $15.00 sur les commandes contenant 3 ou plus d'articles
Reste du monde
Standard Shipping - Untracked bénéficie d'une remise de $13.00 sur les commandes contenant 3 ou plus d'articles

stonehengejpd
stonehengejpd
Selling all kind of gems, great quality at affordable prices, based in the heart of Europe! In case you may have special wishes just let me know :-) If you shouldn´t be satisfied with an order please do not give a negative feedback just let me know and there is always a way to find a solution that everybody is happy!
Graz , Austria
Vérifié
2860

  • andrewchi
    andrewchi
    Positif

    Received, thank you

  • davetcummings
    davetcummings
    Positif

    This gem arrived in a reasonable time, and it is absolutely spectacular. It looked exactly like the photos and the cut was just perfect. I will certainly do business with stonehengejpd in the future.

  • andrewchi
    andrewchi
    Positif

    Received, thank you

Audit

Ce produit a été audité par un Gemstone Sheriff et ils ont trouvé les éléments suivants :
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Comments

The Verified Seller responsible for this item has diligently provided us with accurate and comprehensive information, encompassing crucial details such as weight, dimensions, and treatment. It is important to reiterate our commitment to upholding the highest standards of integrity and transparency in the gemstone industry. As part of our policy, we strictly permit the sale of exclusively natural gemstones that have been sourced directly from the Earth. However, in the event that a gemstone has undergone any form of treatment, it is mandatory for the seller to provide full disclosure regarding the treatment process. Furthermore, we would like to emphasize that man-made gemstones, including simulants and imitations, are strictly prohibited on our platform. We prioritize the promotion of authentic, natural gemstones to ensure a genuine and trustworthy marketplace for our valued customers. Should you have any further inquiries or require additional assistance, please do not hesitate to reach out. We are here to assist you and provide a seamless experience on Gem Rock Auctions.

Cet audit a été demandé il y a 7 mois
Dernière mise à jour il y a 7 mois

Les détails d'expédition

Expédition:
$16.00 21 les jours via Standard Shipping - Tracked
Expédié depuis:
Austria

Options de paiement

  • paypal
  • stripe
  • escrow
Ce vendeur ajoute 20.00% aux transactions en Austria .

Aperçu

Type d'inscription : Standard
Identifiant du produit : 2402266
Départs : 13th December 2024 02:22 pm PST
* Tous les prix sont en USD