Imperial topaz rough from Ouro Preto, listed by the seller at 50 grams. The species is a high-saturation variety of topaz from a specific Brazilian locality, with a Mohs hardness of 8.
Origin is stated as Ouro Preto, Brazil; 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.
Heat treatment is standard for commercial material in this species and is not always declared as an enhancement on retail listings. Lot photographs in the original listing should be examined before ordering.
| Species | Imperial topaz |
|---|---|
| Origin | Ouro Preto, Brazil |
| Weight (stated) | 50 g |
| Mohs hardness | 8 |
| Treatment | Heat (trade standard) |
| Retailer | Price | Stock | Shipping | |
|---|---|---|---|---|
| ◆Mineral Auctions | $1,408 | In stock | Ground | VISIT → |
Aluminum silicate with fluorine and hydroxyl: natural and treated colors, sources, and trade conventions.