mineral

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Hardness: 5.5-6.5 on Mohs scale; Color: Iridescent purple, blue, and gold over a dark grey/black base; Luster: Metallic; Crystal Structure: Trigonal; Specific Gravity: 5.26; Cleavage: None

Hardness: 5
Luster: Metallic

Identified April 21, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 on Mohs scale; Color: Iridescent purple, blue, and gold over a dark grey/black base; Luster: Metallic; Crystal Structure: Trigonal; Specific Gravity: 5.26; Cleavage: None

Formation & geological history

While hematite is a natural iron oxide mineral formed in sedimentary and igneous environments, this specific 'rainbow' appearance is created in a laboratory. A thin layer of titanium or aluminum is vapor-deposited onto the surface of tumbled natural hematite to create an iridescent effect.

Uses & applications

Primarily used in costume jewelry, decorative worry stones, metaphysical healing/spiritual practices, and as inexpensive collectibles for beginners.

Geological facts

Thin-film interference is the scientific name for the rainbow effect seen on the surface; it is the same phenomenon that creates colors in soap bubbles or oil slicks on water. Natural 'iridescent hematite' does exist, but it rarely displays such uniform and vibrant purple hues as seen in this polished specimen.

Field identification & locations

Identify by its heavy weight (high density) compared to plastic imitations. Unlike many other dark stones, hematite will leave a reddish-brown streak if rubbed on unglazed porcelain. It is extremely common in souvenir shops and gemstone markets.

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