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NATURAL TOPAZ JEWELLERY
While topaz occurs in a spectrum of hues, from warm imperial golds to delicate blush pinks, it is most commonly colourless in its natural state. Although naturally strong blue topaz is exceptionally rare, vibrant blue shades have been widespread in the marketplace since the 1970s due to routine irradiation and heat treatments.
In contrast, natural white topaz remains completely unenhanced and untreated. Mined directly from the earth in its purest form, white topaz offers an authentic, crystal clear transparency and a crisp, silvery radiance that showcases nature’s geometry without intervention.
Colour spectrum
Colourless, red, pink, orange, yellow, brown, purple, blue and (rarely) green
Pictured: Emerald Cut White Topaz Necklace
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Al₂SiO₄(F,OH)₂
Silicate of aluminium and fluorine
An aluminosilicate with varying amounts of fluoride and hydroxide ions, valued for its exceptional optical transparency and clear, crystalline structure.
8
on the Mohs scale
Rating an 8 on the Mohs Hardness Scale, white topaz provides dependable scratch resistance, making it exceptionally well suited for everyday fine jewellery.
Demonstrating remarkable versatility across cuts, natural white topaz reflects light with a cool, silvery flash, whether faceted into an emerald cut to showcase its pure, crystalline clarity, or a round brilliant cut to maximise its natural fire.
Natural white topaz, white sapphire, and moissanite each offer distinct optical profiles, hardness levels, and origins.
| Feature | Only at UgemsNatural White Topaz | White Sapphire | Moissanite |
|---|---|---|---|
| Origin & Authenticity | 100% Natural & UntreatedMined directly from the earth in pure colourless form. | Natural or SyntheticHigh clarity natural stones are rare; most are lab grown or heat treated. | 100% SyntheticVirtually all moissanite used in jewellery is lab created silicon carbide. |
| Mohs Hardness | 8 / 10Dependable scratch resistance suitable for daily wear when thoughtfully set. | 9 / 10Extremely hard corundum mineral with high scratch resistance. | 9.25 / 10Exceptional hardness, second only to diamond. |
| Refractive Index (Lustre) | 1.61 to 1.64Cool, watery transparency with clean light transmission. | 1.76 to 1.77Soft, muted glow with modest surface reflection. | 2.65 to 2.69Intense brilliance with high light reflection. |
| Dispersion (Fire) | 0.014Crisp, silvery flashes that highlight precision step cuts. | 0.018Subtle, understated dispersion without prominent colour flashes. | 0.104Dramatic, rainbow coloured fire produced by strong double refraction. |
| Visual Character | Architectural & LuminousSilvery, watery clarity that emphasises structural gem geometry. | Soft & VelvetyUnderstated glow; can occasionally appear slightly cool or muted in larger facets. | Fiery & Ultra RadiantHigh sparkle rainbow flashes engineered for maximum visual impact. |
| Ugems co. Positioning | Exclusively FeaturedChosen for its 100% natural, untreated origin. Every gem is earth born and unique; we never use synthetic stones. | Not OfferedNatural, untreated white sapphires of high clarity are exceedingly rare. As the vast majority on the market are lab grown or heat treated, they do not align with our guarantee of natural gemstones. | Not OfferedA synthetic, lab created gem. As we work solely with authentic earth born stones, moissanite is never featured in our collection. |
Learn more about Our Materials or find ideas in The Art of Gifting.
