Grandidierite Cabochon Value Guide

First discovered in 1902 by Alfred Lacroix, Grandidierite is one of the world's rarest minerals, primarily sourced from southern Madagascar. These cabochons are highly collectible due to their distinct bluish-green hue and the historical legacy of being named after explorer Alfred Grandidier.

What affects the value of Grandidierite Cabochon?

• The intensity and saturation of the bluish-green color significantly impact the $750-$825 price range.
• Clarity and translucency levels, as more transparent grandidierite is exceptionally rare and commands a premium.
• The quality of the cabochon polish and the symmetry of the rounded shape.
• The presence of visible pleochroic shifts which enhance the gemstone's desirability for connoisseurs.

How to Identify Grandidierite Cabochon?

• Observe the distinct bluish-green hue characteristic of authentic Madagascar specimens.
• Check for strong pleochroism, where the stone shifts between blue, green, and white when viewed from different angles.
• Verify the polished, rounded cabochon cut which is often used to showcase the depth of color in translucent to opaque material.
• Confirm the mineral's hardness and specific gravity to distinguish it from similar-looking stones like apatite or beryl.

History of Grandidierite Cabochon

Grandidierite is a rare mineral first discovered in southern Madagascar in 1902 by Alfred Lacroix, who named it in honor of French explorer and naturalist Alfred Grandidier. Known for its striking pleochroism, it displays different colors depending on the viewing angle, often shifting between blue, green, and white. Its rarity and unique color have made it a prized gemstone among collectors and connoisseurs.