Login
  • Learn
  • About Us
    • iRocks History
    • Natural Art
    • What is the Arkenstone?
    • Affiliated Sites
    • Locations
      • Dallas Gallery
      • China Exhibits
    • Services
      • Collection Consulting Services
      • Lucite Bases
      • Fine Mineral Photography
    • Staff Bios
  • Events
    • Shows
    • Dallas Mineral Collecting Symposium
    • Auctions
    • Exhibits
  • Minerals in the Media
    • Recommended Reading
    • Arkenstone Publications
    • News Articles
    • Video Clips
    • Arkenstone Covers
    • Minerals for Kids
  • The Wisdom Pocket Blog
  • Contact
  • Shop
  • New Galleries
  • Themed Galleries
  • The Vault
  • Order Specimens
  • Mineral Auctions
  • SALE
  • Login
  • Advanced Search

Grandidierite

Grandidierite is a rare magnesium aluminum oxide-borosilicate and occurs as a rare accessory mineral in high-temperature, low-pressure metamorphosed aluminous boron-rich rocks such as pegmatites, aplites, and gneisses. The type locality is Cap Andrahomana, Ranopiso Commune, Taolagnaro district (Fort Dauphin), Anosy Region (Fort Dauphin Region), Tulear Province (Toliara), Madagascar, where it occurs as orthorhombic, blue-green, tabular, translucent, vitreous crystals. Grandidierite was named in 1902 for French explorer Alfred Grandidier.

Other notable localities include: Kachebere Hills, Mchinji district, Malawi; Cape Cross area, Swakopmund District, Erongo Region, Namibia; Tizi-Ouchen, Bejaia, Algeria; near Gananoque, Ontario, Canada; Johnsburg, Warren Co., New York, USA; Mt. Amiata and Mt. Cimino, Tuscany, Italy; Vestpolltind, and on Almjotheia, near Moi, Norway; Fiskenaesset, Nuuk, Sermersooq, Greenland Maratakka, Nickerie district, Suriname; and Cuvier Island, New Zealand. It is also known from a number of other minor localities.

You can buy these rare handsome blue green crystals online from The Arkenstone, www.iRocks.com to add fine mineral specimens to your collection.

Grandidierite
JWL20-JH15
Grandidierite
Thumbnail, 2.4 x 1.0 x 0.4 cm
Tranomaro Commune, Amboasary, Tulear Province, Madagascar
SOLD
Details
Grandidierite Crystals
RARE15-012
Grandidierite Crystals
Small Cabinet, 6.0 x 5.0 x 2.5 cm
Cap Andrahomana, Rariopiso Department, Anosy Region, Tulear Province, Madagascar
(5 more images)
SOLD
Details
Grandidierite
UNIVAZ-126
Grandidierite
Thumbnail, 2.4 x 1.8 x 1.3 cm
Vohibolo, Behara, Amboasary, Anosy Region, Tulear, Madagascar
SOLD
Details
Grandidierite
RARE08-09
Grandidierite
Thumbnail, 2.5 x 2.0 x 1.6 cm
Cap Andrahomana, Ranopiso Department, Anosy (Fort Dauphin) Region, Tuloar (Toliara) Province, Madagascar (TYPE LOCALITY)
(2 more images)
SOLD
Details
SEE OUR UPCOMING SHOWS
Featured in The Wisdom Pocket Blog
History of Specimen Mining at Hardangervidda, Norway
Little Wonders: Connoisseur Thumbnails in the Contemporary Collector Market
The Jack Halpern Collection
F. John Barlow Collection: A Modern Mineral Connoisseur
The Miguel Romero Collection of Mexican Minerals
Rare Chalcopyrite Balls from Daye, China
Tourmaline: Most Colorful in the World?
10 Facts You Didn’t Know About Gold, Part 1
The New Arkenstone Gallery
Tips for Buying Rare Rocks and Minerals Online
SHOP
  • New Galleries
  • Themed Galleries
  • The Vault
  • Order Specimens
LEARN
  • About Us
  • Events
  • Minerals in the Media
  • Privacy Policy
  • Terms and Conditions
  • Wisdom Pocket Blog
CONTACT US
  • PO Box 830460 - Richardson, TX - 75083
  • (972) 437-2492
  • info@iRocks.com
COPYRIGHT NOTICE - Please note that any images, photos, or text (unless otherwise stated) are property of The Arkenstone, iRocks.com, and cannot be used without our permission. Having said that, we're quite happy to work with media, educators, and other organizations to provide images. Please e-mail us at info@iRocks.com with a link where you found the image you wish to use and your intended purpose for the image.