White Beryl Identification Guide

What White Beryl Looks Like

White beryl — the colorless variety known as goshenite — is beryllium aluminum silicate (Be3Al2Si6O18). It is colorless to milky white, with a vitreous (glassy) luster and transparency ranging from water-clear to translucent. Its hallmark is a six-sided (hexagonal) prismatic crystal with flat or lightly stepped terminations and faint lengthwise striations on the prism faces. Crystals can be small or massive, and museum-grade prisms are well-formed and elongate.

Key Visual Cues

• Hexagonal prism with a flat basal termination
• Glassy, bright luster
• Colorless to milky white, sometimes with internal veils or inclusions
• Straight striations parallel to the long axis

Step-by-Step Field ID Checklist

1. Check crystal shape. A clean six-sided prism strongly suggests beryl (or quartz — separate by hardness/density).
2. Test hardness. Beryl is harder than quartz; it scratches quartz but not topaz or corundum.
3. Heft it. Beryl feels moderately dense (SG ~2.6–2.9), similar to quartz.
4. Look at terminations. Beryl prisms usually end in a flat basal face; quartz ends in a six-faced pyramid point.
5. Inspect for cleavage. Beryl shows only poor basal cleavage — fractures are mostly conchoidal.

Diagnostic Tests

• Mohs hardness: 7.5–8. Scratches quartz and glass; cannot scratch topaz.
• Streak: White.
• Cleavage/fracture: Imperfect basal cleavage; conchoidal to uneven fracture.
• Density: ~2.66–2.9 g/cm³ — slightly denser than quartz, much lighter than topaz.
• Crystal system: Hexagonal (six-fold symmetry).

Common Look-Alikes and How to Tell Them Apart

• Clear quartz: Both can be colorless hexagonal crystals, but quartz is softer (Mohs 7, won't scratch beryl) and terminates in a pyramid point rather than a flat face. Quartz is also slightly less dense.
• White topaz: Topaz is harder (Mohs 8) and notably denser (SG 3.5–3.6), with a perfect basal cleavage that beryl lacks. Hefting and a cleavage check separate them.
• White sapphire (corundum): Much harder (Mohs 9) and far denser (SG ~4.0); scratches beryl easily.
• Glass: Softer (5–6), often with bubbles and a warmer feel; no true crystal faces.
• Phenakite: Rare; very similar but slightly harder and denser, usually requires gem testing.

Where White Beryl Is Found

Goshenite forms in granite pegmatites and some metamorphic rocks. Classic localities include Goshen, Massachusetts (its namesake), Maine, Brazil, Madagascar, Russia, and Pakistan. Rockhounds find it in pegmatite pockets alongside other beryls, feldspar, mica, and tourmaline.

Collecting Tips

Search pegmatite dumps and pockets for embedded hexagonal prisms. Because colorless beryl can be overlooked, check the crystal symmetry and run a hardness test against a quartz crystal — if your specimen scratches the quartz, it is likely beryl rather than quartz.