Bixbite Identification Guide

What Bixbite Looks Like

Bixbite is the rare red-to-raspberry variety of beryl, colored by manganese. Genuine material is intense pinkish-red, raspberry, or strawberry red, often with a slightly purplish cast. Luster is vitreous (glassy), and stones range from translucent to transparent, though most rough is heavily included.

• Color: raspberry, strawberry, or purplish red — never the pure blood-red of ruby
• Habit: stubby hexagonal (six-sided) prisms with flat or slightly tapered terminations
• Size: almost always small; clean stones over 1 carat are extraordinarily rare
• Inclusions: common — fractures, fingerprints, growth tubes

Step-by-Step Field-ID Checklist

1. Check the crystal shape. Hexagonal prismatic crystals strongly support beryl. Trigonal or barrel shapes suggest ruby instead.
2. Judge the color. Look for a manganese raspberry-red, not a chromium pure red.
3. Test hardness. Beryl is 7.5–8 Mohs; it scratches quartz easily but will not scratch corundum.
4. Look at luster and transparency. Vitreous, glassy, often included.
5. Note the locality. Almost all true bixbite comes from one place (see below) — provenance is a major clue.

Key Diagnostic Tests

• Mohs hardness: 7.5–8. Scratches glass and quartz; cannot scratch sapphire or ruby.
• Streak: white.
• Cleavage/fracture: indistinct cleavage; conchoidal to uneven fracture.
• Specific gravity: ~2.66–2.70 — noticeably light for a red gem, lighter than ruby (~4.0) or garnet (~3.6–4.3). A red stone that feels surprisingly light favors beryl.
• Refractive index: ~1.56–1.60, uniaxial negative; weak dichroism (orangey-red to purplish-red).
• No magnetism, no acid reaction.

Common Look-Alikes and How to Tell Them Apart

• Ruby (corundum): much harder (9), much denser (SG ~4.0), and trigonal/barrel crystals. Ruby's red is a pure chromium red.
• Rubellite (red/pink tourmaline): trigonal prisms with striations and rounded triangular cross-section; strong dichroism; SG ~3.0–3.1, denser than beryl.
• Pyrope/almandine garnet: isometric (no crystal faces like prisms), singly refractive, denser (SG 3.6+), and may be slightly magnetic.
• Spinel: isometric octahedra, singly refractive, SG ~3.6.
• Synthetic red beryl: exists and is convincing; clean, large, inclusion-free "bixbite" should be treated with suspicion and sent for lab testing.

The single most useful field discriminator is density combined with crystal shape: a light-feeling, hexagonal, raspberry-red crystal is almost certainly bixbite.

Where Bixbite Is Found

Gem-quality bixbite is famously associated with the Wah Wah Mountains and the Thomas Range in Utah, USA, where it forms in topaz-bearing rhyolite. Small amounts have been reported in New Mexico. Because economic deposits are essentially limited to Utah, a credible Utah rhyolite provenance is strong supporting evidence, while a stone claimed from elsewhere deserves extra scrutiny.

Quick Confirmation

If a small raspberry-red crystal shows hexagonal faces, hardness near 8, a white streak, low density for its color, and a Utah rhyolite origin, you almost certainly have genuine bixbite.