Photographed under daylight-balanced light without retouching. Colour may shift slightly under warm indoor lighting.

Rough Crystal

Sky Blue Topaz 88.74g Rough Crystal

$866.50

Blue88.74 gOne of a kind

Our guarantee: 30-day returns, full refund, insured and tracked from our workshop to your door. Payment is covered by PayPal Buyer Protection.

A natural sky blue topaz weighing 88.74 grams mined in Pakistan. Untouched rough exactly as it came out of the ground, for cutters, wire wrappers and collectors who want the crystal habit intact. Care.

Topaz has perfect basal cleavage, a sharp knock in the wrong direction can split it regardless of its hardness. Never ultrasonic or steam. Avoid prolonged strong light for pink material.

Treatment. Blue topaz is almost always irradiated and heated colourless topaz. The treatment is permanent and the material is safe.

Imperial topaz is naturally coloured.

Specification

Species: Topaz
Variety: Sky Blue Topaz
Weight: 88.74 g
Colour: Blue
Origin: Pakistan
Treatment: Blue topaz is almost always irradiated and heated colourless topaz. The treatment is permanent and the material is safe. Imperial topaz is naturally coloured.
Mohs hardness: 8
Refractive index: 1.609 - 1.643
Specific gravity: 3.53
Crystal system: Orthorhombic
Chemical formula: Al2SiO4(F,OH)2

Ships from Peshawar, Pakistan. Dispatched within 1–3 working days, tracked and insured. Free worldwide over $500.

Returns. 30 days, unworn and in original packaging. Custom-set jewellery is excluded.

What to look for in topaz

Sky blue, Swiss blue and London blue describe increasing depth of colour, not different species. Imperial topaz, the natural golden to peach-pink material, is far rarer than any blue topaz and priced accordingly.

Value is driven by: Natural vs treated colour, size, cut precision.

Living with this stone

Topaz has perfect basal cleavage, a sharp knock in the wrong direction can split it regardless of its hardness. Never ultrasonic or steam. Avoid prolonged strong light for pink material.

Birthstone: November, December
Anniversary: 4th & 23rd
Chakra: Throat (blue), Solar Plexus (golden)
Zodiac: Sagittarius, Scorpio

Topaz questions, answered

Is blue topaz natural?

The material is natural topaz, but the blue colour is nearly always produced by irradiating and heating colourless topaz. The colour is permanent and the stones are safe to wear. Naturally blue topaz exists but is pale and commercially rare.

What is imperial topaz?

Imperial topaz is the naturally golden-orange to pinkish material, historically from Ouro Preto in Brazil. It is not irradiated, is far scarcer than blue topaz, and holds its value much better.

Why does topaz chip if it is hardness 8?

Hardness measures scratch resistance, not toughness. Topaz has one direction of perfect cleavage, so an impact aligned with that plane can cleave the stone cleanly even though it resists scratching very well.

Read the full topaz guide →