10.36ct ETW Earth-Mined Greenish Blue Grandidierite – Pentagon Cut, Large Stone

10.36ct ETW Earth-Mined Greenish Blue Grandidierite – Pentagon Cut, Large Stone

This impressive loose gemstone features an earth-mined greenish blue grandidierite from Madagascar, showcasing distinctive blue-green coloration in an unusual pentagon cut. Its substantial 10.36-carat weight, opaque clarity, and generous dimensions create a striking presentation for custom statement jewelry or gemstone collecting.

Specifications:

Gemstone: Greenish Blue Grandidierite
Carat Weight: 10.36ct ETW
Cut: Pentagon Cut
Dimensions: 15.7 x 15.2 x 8.2 mm
Clarity: Opaque
Origin: Madagascar
Condition: New

Earth-mined greenish blue grandidierite weighing 10.36ct ETW in a distinctive pentagon cut from Madagascar, featuring opaque clarity and impressive dimensions.

This grandidierite displays an appealing combination of green and blue tones, creating a distinctive appearance that sets it apart from more familiar colored gemstones. Its opaque character emphasizes the gemstone's body color rather than internal transparency, while its unusual pentagonal outline provides an eye-catching geometric presentation.

Grandidierite is a rare magnesium-aluminum borosilicate mineral first discovered in Madagascar in 1902. It was named in honor of French naturalist and explorer Alfred Grandidier, who conducted extensive studies of Madagascar's natural history. The mineral is particularly admired for its distinctive blue-green coloration, which is primarily associated with iron within its crystal structure.

Although grandidierite is considered a rare mineral, its gemological value varies considerably according to transparency, color, size, and overall quality. Transparent, facetable specimens are exceptionally uncommon, while opaque material offers a different collectible appeal through its distinctive coloration and mineral identity.

At 10.36 carats with dimensions of 15.7 x 15.2 x 8.2 mm, this gemstone offers substantial visual presence. Its bold pentagon shape makes it particularly well suited for a custom statement pendant, where its unusual geometry and greenish blue coloration can be prominently displayed. It also makes an interesting addition to a collection of uncommon gemstone species.

Madagascar holds a special place in the history of grandidierite as the location of its original discovery. The island is recognized for its remarkable mineral diversity and remains an important source of this unusual gemstone species. With a hardness of approximately 7 to 7.5 on the Mohs scale, grandidierite offers reasonable scratch resistance when handled with care.

An impressive earth-mined greenish blue grandidierite from Madagascar, offering unusual pentagonal styling, substantial size, and the distinctive character of a rare gemstone species.

(Stock Code: EDMM)

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