Product Description
Sky Blue Topaz Facet Rough — Brazil
- This listing offers a 1000-gram natural sky blue facet rough in loose rough form.
- sourced directly from Brazil — one of the world's most established topaz-producing regions.
- Each piece of these untreated sky blue topaz rough is offered as-is, with no treatment applied, making it well-suited for lapidaries and gem cutters who prefer to work with natural material.
- The sky blue colour in this lot is a naturally occurring hue characteristic of Brazilian topaz, distinct from the heat- or irradiation-treated blues common in the trade.
- Individual piece weights range from 2 to 10 grams, giving cutters a practical range of rough to work with.
- Classified as a semi-precious stone, this Brazil origin sky blue topaz rough is facet-grade rough — meaning the material has been selected for its potential to yield clean, well-proportioned faceted gemstones.
- It is also recognised as the traditional November birthstone.
Lot Details
- Stone: Topaz
- Color: Sky Blue
- Origin: Brazil
- Treatment: None
- Form: Loose Rough (Facet Grade)
- Piece Weight Range: 2–10 grams
- Total Lot Weight: 1 KG
- Gem Type: Semi-Precious
- Birthstone: November
Frequently Asked Questions
Q: Is sky blue topaz naturally that colour, or is it treated?
A: Most blue topaz in the market is heat- or irradiation-treated. This lot is untreated, so the sky blue colour is natural — which is less common and worth noting for buyers who prioritise natural material.
Q: What carat yield can I expect from Brazilian topaz facet rough?
A: Yield depends on clarity and inclusions within each piece, but facet-grade rough is selected to maximise cuttable material. Expect roughly 20–40% recovery depending on the individual stone's geometry and internal features.
Q: How is topaz different from blue quartz or aquamarine?
A: Topaz (Mohs 8) is harder and denser than both quartz (Mohs 7) and aquamarine (Mohs 7.5–8), and its crystal structure is orthorhombic rather than trigonal or hexagonal — making it optically and physically distinct despite similar colour ranges.