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Grandidierite, 3.15ct, emerald cut extraordinary gem from Madagascar!
- SKU
- Dip3
- Dimensions (mm)
- 11.000 x 8.500 x 3.900mm
- Weight (cts)
- 3.150
- Treatment
- No Treatment
- Shape
- Emerald
- Type
- Faceted
- Clarity
- SI
- Colours
-
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!
| Shipping provider | Shipping to Austria | Shipping to rest of world | Combined Shipping (Austria) | Combined Shipping (rest of the world) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
$9.00
/ 3 days
|
$16.00
/ 18 days
|
$15.00
on orders with 3 items or more
|
$24.00
on orders with 3 items or more
|
| FedEx |
$38.00
/ 3 days
|
$48.00
/ 7 days
|
$29.00
on orders with 2 items or more
|
$45.00
on orders with 2 items or more
|
| DHL |
$45.00
/ 2 days
|
$60.00
/ 5 days
|
$25.00
on orders with 3 items or more
|
$55.00
on orders with 3 items or more
|
| Express Shipping |
$29.00
/ 2 days
|
$75.00
/ 5 days
|
$59.00
on orders with 3 items or more
|
$65.00
on orders with 3 items or more
|
| Registered Shipping |
$9.00
/ 7 days
|
$18.00
/ 21 days
|
$18.00
on orders with 3 items or more
|
$17.00
on orders with 3 items or more
|
| Standard Shipping - Untracked |
$6.00
/ 3 days
|
$16.00
/ 28 days
|
$15.00
on orders with 3 items or more
|
$14.00
on orders with 3 items or more
|
| UPS |
$29.00
/ 2 days
|
$60.00
/ 6 days
|
$20.00
on orders over
$50.00
|
$55.00
on orders over
$120.00
|
- SKU
- Dip3
- Dimensions (mm)
- 11.000 x 8.500 x 3.900 mm
- Weight (cts)
- 3.150
- Treatment
- No Treatment
- Shape
- Emerald
- Type
- Faceted
- Clarity
- SI
- Colours
-
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!
| Shipping provider | Shipping to Austria | Shipping to rest of world | Combined Shipping (Austria) | Combined Shipping (rest of the world) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
$9.00
/ 3 days
|
$16.00
/ 18 days
|
$15.00
on orders with 3 items or more
|
$24.00
on orders with 3 items or more
|
| FedEx |
$38.00
/ 3 days
|
$48.00
/ 7 days
|
$29.00
on orders with 2 items or more
|
$45.00
on orders with 2 items or more
|
| DHL |
$45.00
/ 2 days
|
$60.00
/ 5 days
|
$25.00
on orders with 3 items or more
|
$55.00
on orders with 3 items or more
|
| Express Shipping |
$29.00
/ 2 days
|
$75.00
/ 5 days
|
$59.00
on orders with 3 items or more
|
$65.00
on orders with 3 items or more
|
| Registered Shipping |
$9.00
/ 7 days
|
$18.00
/ 21 days
|
$18.00
on orders with 3 items or more
|
$17.00
on orders with 3 items or more
|
| Standard Shipping - Untracked |
$6.00
/ 3 days
|
$16.00
/ 28 days
|
$15.00
on orders with 3 items or more
|
$14.00
on orders with 3 items or more
|
| UPS |
$29.00
/ 2 days
|
$60.00
/ 6 days
|
$20.00
on orders over
$50.00
|
$55.00
on orders over
$120.00
|
Selling all kind of gems, great quality at affordable prices, based in the heart of Europe! In case....
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Positiveexcellent seller...fast shipping. ..beautiful stone...100% guarantee...I will buy again!
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Positive
Wow, I’ve never seen a tourm like this before. Definitely tests as a tourmaline. Appears to have a genuine spectrum dependent colour change, not usambara or classic pleochroism. A very special gem - thank you so much.
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Positive
Fantastic stone in person
