No products in the cart.
Topaz Rough Gems
-
112.55 Carats Facet Grade Rough Swiss Blue Topaz
112.55 Carats Facet Grade Rough Swiss Blue Topaz, available for sale, natural high-quality loupe clean rough topaz gemstone from Brazil.
$ 180Add to cart -
Brazilian Swiss Blue Topaz Facet Rough
Brazilian Swiss Blue Topaz Facet Rough, available for sale, natural high-quality loupe clean rough topaz, 89.40 carats topaz gemstone from Brazil.
$ 145Add to cart -
Sky Blue Topaz Facet Rough Gemstone
Sky Blue Topaz Facet Rough Gemstone, available for sale, natural high quality, rough topaz gemstone from Brazil.
$ 135Add to cart -
135.85 Carats Facet Rough Electric Swiss Blue Topaz Duo
135.85 Carats Facet Rough Electric Swiss Blue Topaz Duo is for sale at wholesale price from Brazil.
$ 215Add to cart$ 225 -
94 Carats Natural Rough Electric Swiss Blue Topaz
94 Carats Natural Rough Electric Swiss Blue Topaz is for sale at wholesale price from Brazil.
$ 150Add to cart -
437 Carats Light Blue Topaz Facet Rough Pieces
437 Carats Light Blue Topaz Facet Rough Pieces are for sale at wholesale price from Brazil.
$ 385Add to cart -
86.60 carats Facet Rough Light Yellow Topaz Pieces
86.60 carats Facet Rough Light Yellow Topaz Pieces is for sale at wholesale price from Nigeria.
$ 120Add to cart -
50.1 Grams Facet Rough White Topaz
Buy 50.1 Grams or 250.5 carats of Facet Rough White Topaz at wholesale price from Madagascar.
$ 125Add to cart -
36.6 Grams White Topaz Rough
Buy 36.6 Grams of White Topaz Rough at wholesale price from Madagascar available in Colorless, blue, brown, orange, grey, yellow, green, and red-pink colors.
$ 92$ 105Add to cart36.6 Grams White Topaz Rough
$ 92$ 105 -
87.50 Carats Light Yellow Topaz Facet Rough Pieces
87.50 Carats Light Yellow Topaz Facet Rough Pieces are for sale at wholesale price from Nigeria.
$ 125Add to cart -
Buy 75 Carats Blue Rough Topaz
Buy 75 Carats or 15 grams of Blue Rough Topaz which is for sale at wholesale price.
$ 150Add to cart -
44.4 Grams White Topaz Facet Rough
Buy 44.4 Grams of White Topaz Facet Rough at wholesale price from Madagascar which is available in Colorless, blue, brown, orange, grey, yellow, green, and red-pink colors.
$ 110Add to cart
Rough Topaz is mostly associated with blue these days; it actually comes in a wide range of attractive colors, with the sunset orange variety, Imperial Topaz, the most valuable.
Rough Topaz has been used to refer to yellowish gemstones for at least two thousand years, although early rough gemstone traders did not realize that these yellow gemstones could be a variety of different crystals. As rough gemstone traders began to get more sophisticated, they realized that these yellow gemstones may be sapphire, quartz, beryl, or what we now know as topaz.
The name topaz may have been derived from the Greek island of Topázos in the Red Sea where a yellow gemstone was mined and the Greek verb topazein meaning ‘to try to find’ but we prefer the Sanskrit word ‘Tapas’ meaning heat or fire as the source of the modern ‘topaz’ as it more captures the brilliance of the gemstone. Rough Topaz makes an ideal gemstone. It comes in a wide range of colors. Its relatively hard qualities allow for many uses.
Gemological Properties of Rough Topaz:
Chemical Formula | Al2 SiO4 (F, OH) 2 Fluor containing aluminum silicate. |
Crystal Structure | Prisms with multi-faceted ends, orthorhombic, often octagonal in cross-section. |
Color | Colorless, light to dark blue, yellow, orange, red-brown, pink-red, red, violet, light green. |
Hardness | 8 on the Mohs scale |
Refractive Index | 1.609 – 1.643 |
Density | 3.49 – 3.57 |
Cleavage | Perfect |
Transparency | Translucent to transparent |
Double Refraction or Birefringence | 0.008 to 0.016 |
Luster | Vitreous |
Fluorescence | Under long wavelength UV, white and blue shows a weak yellow or greenish glow; yellow, brown, and pink can show a robust orange-yellow glow; red shows a soft yellow-brown glow. |
Check out our Rough Topaz category for large pieces of rough that are ideal to practice faceting on. The Loose Topaz and Topaz Specimens category has some beautiful terminated examples of various colors of Topaz.