Natural Grandidierite is an extremely rare mineral and gemstone prized for its distinctive blue-green to dark green color, which can appear differently from various angles due to strong pleochroism. It is a silicate mineral composed of aluminum, boron, oxygen, and silicon, first discovered in Madagascar in 1902 and named after French explorer Alfred Grandidier. While primarily found in Madagascar, it also occurs in other locations, and transparency is the most valued quality for gem-grade material.

Key Characteristics

• Color:

  Exhibits a unique blue-green to dark green coloration and a strong trichroic pleochroism effect, meaning it can show different colors (blue-green, colorless, or dark green) when viewed from different angles.

• Composition:

  A silicate mineral made of aluminum, boron, oxygen, and silicon.

• Rarity:

  It is one of the rarest gemstones in the world, making it highly sought after by collectors and mineral enthusiasts.

• Origin:

  First discovered in southern Madagascar in 1902, though it is also found in Sri Lanka, Malawi, Namibia, and Algeria, among other locations.

Value & Uses

• Transparency:

  Fully transparent gem-quality Grandidierite is extremely rare and commands the highest value.

• Jewelry & Collecting:

  Its beauty and rarity make it a prized gem for fine jewelry and mineral collections.

• Spirituality:

  Some believe it has properties for stress relief, promoting calmness, and easing anxiety