Bands are growth, not dye

Fluorite, sliced

$68

Fluorite is calcium fluoride, and it grows in bands — each colour zone is a separate episode of crystal growth with a different trace impurity in the solution. Sliced across the bands and polished on both faces, the zoning reads as a map. Colour ranges from nearly clear to green, purple and blue in the same piece.

Material

Fluorite (CaF₂), sliced and polished both faces

Hardness

4 on the Mohs scale — softer than steel

Form

Free-form slice, natural banding

Care

Handle by the edges. Keep away from other stones; fluorite scratches easily. Polishing dust is a workshop hazard, not a handling one — a finished slice is safe to keep on a shelf.

Treatment

None declared — written confirmation from the supplier is still being collected

Every stone carries a treatment line in its specification table. "None declared" means the supplier has not told us of any treatment and we are still collecting that statement in writing. If a stone has been heated, irradiated, dyed or resin-filled, we say which — a treated stone is not a defect, but it is a different object, and some treatments change how it should be kept.

Ships from Hangzhou in 2–5 business days. Delivery is typically 7–15 business days to the US and 8–16 to the EU, UK, Australia and New Zealand, customs permitting. Import duties and taxes are charged by your country's customs, not by us, and are payable on delivery. The United States ended its $800 duty-free exemption on 29 August 2025, so US orders now attract duty at every value. The EU introduces a flat €3 duty per item on goods below €150 from 1 July 2026. Shipping details.