22.37ct ETW Earth-Mined Bluish Green Grandidierite – Cushion Cut, Large Stone

22.37ct ETW Earth-Mined Bluish Green Grandidierite – Cushion Cut, Large Stone

This impressive loose gemstone features an earth-mined bluish green grandidierite from Madagascar, showcasing distinctive blue-green coloration in an elegant cushion cut. Weighing an exceptional 22.37 carats, this unheated gemstone offers substantial dimensions, opaque clarity, and the fascinating mineral character associated with one of the more unusual gemstone species.

Specifications:

Gemstone: Bluish Green Grandidierite
Carat Weight: 22.37ct ETW
Cut: Cushion Cut
Dimensions: 18.5 x 15.0 x 13.0 mm
Clarity: Opaque
Treatment: Unheated
Origin: Madagascar
Condition: New

Earth-mined bluish green grandidierite weighing 22.37ct ETW in a cushion cut from Madagascar, featuring opaque clarity, unheated character, and impressive dimensions.

This grandidierite displays an attractive combination of blue and green tones, creating a distinctive appearance that separates it from more familiar colored gemstones. Its cushion cut combines softly rounded corners with a classic geometric outline, offering a substantial presentation that emphasizes the gemstone's natural body color.

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, whose extensive studies contributed significantly to the understanding of Madagascar's natural history. The mineral is particularly recognized for its characteristic blue-green coloration, which is primarily associated with iron within its crystal structure.

Although grandidierite is an uncommon mineral species, its gemological characteristics vary considerably. Transparent, facetable examples are exceptionally scarce and particularly sought after by collectors, while opaque specimens offer a different form of appeal through their distinctive coloration, mineral composition, and substantial physical presence.

This gemstone features opaque clarity, emphasizing its solid blue-green body color rather than transparency or internal brilliance. Its natural mineral character contributes to its individuality, making it an interesting specimen for collectors who appreciate unusual gemstone materials.

The gemstone is unheated, retaining its naturally occurring coloration without heat enhancement. Its combination of substantial size and distinctive color makes it an appealing example of Madagascar's remarkable gemstone diversity.

At 22.37 carats with dimensions of 18.5 x 15.0 x 13.0 mm, this grandidierite offers exceptional visual presence. Its large cushion shape makes it particularly suitable for a custom statement pendant, where its impressive proportions and unusual coloration can be prominently displayed. It would also make a distinctive centerpiece in a collection of uncommon gemstone species.

Madagascar holds special significance in the history of grandidierite as the location of its original discovery. The island is internationally recognized for its extraordinary mineral diversity and remains an important source of this unusual gemstone material.

With a hardness of approximately 7 to 7.5 on the Mohs scale, grandidierite offers reasonable resistance to scratching when properly cared for. Protective settings and precautions against sharp impacts are recommended to preserve its polished surfaces and edges.

An impressive earth-mined bluish green grandidierite offering substantial size, distinctive natural coloration, and elegant cushion-cut styling, together with the collectible appeal of an uncommon gemstone species.

(Stock Code: EDMM)

Keywords: loose gemstone, earth-mined grandidierite, bluish green grandidierite, blue green grandidierite, Madagascar grandidierite, Madagascan gemstone, cushion cut grandidierite, opaque grandidierite, unheated grandidierite, 22.37ct grandidierite, large grandidierite, rare mineral gemstone, collector gemstone, statement pendant gemstone