Iolite (cordierite) rough from Tanzania, listed by the seller at 14 grams. The species is a member of the gem-grade silicate family, with a Mohs hardness of 7–7.5.
Origin is stated as Tanzania; commercial rough from this region is described in the trade as exhibiting characteristic colorzonation and inclusion patterns. Faceting.com reproduces the seller's stated origin without independent verification.
The seller declares no treatment or enhancement. Lot photographs in the original listing should be examined before ordering.
| Species | Iolite (cordierite) |
|---|---|
| Origin | Tanzania |
| Weight (stated) | 14 g |
| Mohs hardness | 7–7.5 |
| Treatment | None declared |
| Retailer | Price | Stock | Shipping | |
|---|---|---|---|---|
| ◆Gem Rock Auctions | $16.33 | In stock | Ground | VISIT → |
| Rio Grande | $16 | In stock | Ground | VISIT → |