Mogok Spinel Octahedron Crystal 0.36ct | Nat Thew | Collector's Piece | UK

A natural red spinel octahedron crystal from Mogok, Myanmar — 0.36ct, entirely uncut and untreated. Known in Myanmar as "Nat Thew," these naturally formed octahedral crystals display spinel's characteristic crystal habit: eight perfectly formed equilateral triangular faces with smooth, mirror-like surfaces. This is not a faceted gemstone — it is a natural crystal structure, preserved exactly as it formed in the earth.

Product Details

• Colour: Red
• Form: Natural Octahedron Crystal (Uncut)
• Weight: 0.36ct
• Origin: Mogok, Myanmar
• Mineral: Natural Spinel
• Hardness: 8 (Mohs scale)
• Treatments: None
• Product Code: E0013

What Is a Nat Thew Crystal?

"Nat Thew" is a Burmese term for these naturally formed spinel octahedra. Spinel is one of the few minerals that reliably crystallises into near-perfect octahedral forms — eight smooth, triangular faces meeting at precise vertices. In Mogok, these crystals hold cultural significance and are collected by mineral enthusiasts, gemstone specialists, and jewellery designers who want to work with spinel in its most natural state. Each Nat Thew is unique and cannot be replicated. They are suitable for mineral collections, display pieces, and increasingly as raw elements in contemporary jewellery design.

About Natural Spinel Gem

We specialise in natural untreated spinel, sourced directly from small-scale miners in Mogok, Myanmar — one of the world's most celebrated gem origins. Gemstones are hand-cut locally. All gemstones are available for private viewing across London at your business premises or by appointment at Hatton Garden.