Astro West Fine Minerals

Grandidierite // 152 Grams


This magnesium aluminum oxide-borosilicate was discovered in 1902 in southern Madagascar and named for French explorer Alfred Grandidier. One of the rarest gemstones on the planet, gem quality grandidierite displays pleochroism – meaning it appears to change color when viewed from different angles. This coveted stone often forms inside pegmatites. This is a beautiful crystallized greenish-blue cluster from Madagascar. It is the largest, highest quality specimen currently on the market and will make an excellent addition to any well-curated collection.

Dimensions: 3-1/4”L x 1-7/8”W x 2-3/4”H, Weight: 152 g

-Orders are processed within two business days of being placed online unless otherwise specified on the product detail page
-If the order is Priority Mail Express and is received before 2pm it will be sent out that same business day unless otherwise specified on the product detail page
-If standard or Priority Shipping is selected and the item must be received promptly, please call us at 646-781-9377 or email us at

- We believe you will be satisfied with your purchase or we’ll refund your purchase price in full upon safe return of the specimen in original condition within one week.
- If you are unsatisfied with your purchase let us know immediately so we can begin to resolve the issue as soon as possible.
- All refunds are processed within two weeks from the date when the specimen was received back. If it is a result of damage on arrival, refund may be delayed based on insurance claims.
- If your item arrives damaged, please contact us and we will resolve everything at your convenience. But DOA (Damage On Arrival) must be reported within one business day from the delivery date, no exceptions.
- All returned items must be sent back in original packaging accompanied by packing slip.

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