Grandidierite is a rare mineral and gem that was first discovered in 1902 in southern Madagascar.iolet, and rich purple, exotic tanzanite is found in only one place on earth, near majestic Mount Kilimanjaro 🏔

The mineral was named in honor of French explorer Alfred Grandidier. The facet grade stones are very difficult to find.

Hardness 7,5 on the moh scale. Collector gemstone.

Grandidierite represents a remarkable achievement in mineral formation, requiring specific geological conditions and precise chemical compositions to form. This rare borosilicate mineral showcases a distinctive blue-green color and unique optical properties that make it instantly recognizable to experts. While most specimens are translucent to opaque, the extremely rare transparent varieties are considered among the most valuable gemstones in existence, rivaling fine diamonds in price per carat.