The environment was also anoxic

It measures 53x51x9 mm

This is an Adamite Crystals on Limonite matrix mined in Mina Ojuela

prismatic crystals

Product ID: TONB0295

Tanzanite | Octagon Cut | 5.6x3.8mm 0.6ct | Tanzania | SO24 Titanite The environment was also anoxicProduct Type: Tanzanite Approx Weight (per piece): 0. 6ct Size: 5. 6x3. 8mm Shape: Octagon Cut Color: Purplish Blue Clarity: Clean to the eye Origin: Tanzania Tanzanite is renowned for its intense blue and violet colors, but can also be golden, green, lilac and peacock (blue and green). The sole source of tanzanite is the Merelani Hills in northern Tanzania. Discovered in the 1960s, tanzanite is considered rarer than diamonds due to its single source