How do I identify Grandidierite?

Grandidierite can be identified by its hardness of 7.5 on the Mohs scale, Bluish green color, Vitreous, Pearly luster, Orthorhombic crystal system. Look for these key characteristics when examining specimens.

What color is Grandidierite?

Grandidierite typically appears in Bluish green, greenish blue. Color can vary depending on impurities and formation conditions.

How hard is Grandidierite?

Grandidierite has a hardness of 7.5 on the Mohs scale. This makes it a relatively hard mineral suitable for jewelry.

Grandidierite

A variety of Minerals

What is Grandidierite?

Originating from Madagascar, grandidierite was discovered by French explorer Alfred Grandidier in 1902. Grandidierite is highly valued for its striking blue-green color, often compared to the vibrant hues of renowned paraíba tourmaline. Its combination of scarcity and remarkable beauty makes it a prized addition to fine jewelry, fetching high market value. The largest cut specimen currently known to the GIA weighs in at 763.5 carats.

Optical Properties

Refractive Index: 1.578-1.639
Birefringence: 0.037-0.039
Pleochroism: Distinct: greenish blue, colorless, blue-green
Optical Character: Biaxial negative

Grandidierite Market Value Calculator

Estimate the market value of Grandidierite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.