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Hambergite
Hambergite is borates, Be2(BO3)(OH,F). In the hand, it rates 7.5 on the Mohs scale, and it runs colorless and white. Colorless striated prisms that look like plain quartz until you notice the strong doubling of facets seen through the stone (very high birefringence) and the feather-light heft.
The geology.
Hambergite carries the formula Be2(BO3)(OH,F). It belongs to the orthorhombic system. On paper it is borates.
It sits at 7.5 on the Mohs scale. The surface reads vitreous. Light behaviour is transparent to translucent. Specific gravity runs 2.35. The streak is white. It breaks with perfect cleavage; brittle.
Colorless striated prisms that look like plain quartz until you notice the strong doubling of facets seen through the stone (very high birefringence) and the feather-light heft.
Expect to see it as prismatic striated crystals or faceted collector gems.
The origins.
Granite pegmatites: Madagascar, Pamir Mountains (Tajikistan), Myanmar, Norway (type locality area finds).
On value, the database notes: collector rarity; clean faceted stones fetch strong prices.
Traditional associations.
In energy work traditions, associated with clarity of intention and decisive simplicity.
Recorded here because it is part of how this material is sold, not because it is a property of the material.
Spotting the real thing.
Colorless striated prisms that look like plain quartz until you notice the strong doubling of facets seen through the stone (very high birefringence) and the feather-light heft.
Quartz is occasionally mislabeled hambergite; the doubling test exposes it in seconds.
| Looks like | How to tell them apart |
|---|---|
| Quartz crystal | Quartz lacks visible facet doubling and cleavage; hambergite shows both |
| Topaz | Topaz is far denser (SG 3.5); hambergite floats lighter than quartz at 2.35 |
| Danburite | Danburite has wedge terminations and SG 3.0 without strong doubling |
At-home tests.
None of these need a lab. A 10x loupe, good daylight and a steady hand cover most of what a buyer needs to know about hambergite.
| Test | What you should see |
|---|---|
| Scratch check | Scratches glass easily (7.5) |
| Look through a facet | back edges appear doubled |
| By weight | Surprisingly light for its size (SG 2.35) |
Stop short of anything that leaves a mark. A gemologist can answer the rest without damaging the stone.
Care & handling.
At 7.5 on the Mohs scale it stands up to everyday wear. It will still chip on a hard knock, so treat edges and points with respect.
It breaks with perfect cleavage; brittle, which is worth knowing before you set it or drop it.
Skip the ultrasonic. Lukewarm water, mild soap and a soft cloth handle routine cleaning without risk.
Beryllium-bearing: avoid cutting or grinding dust; finished stones and crystals are safe to handle.
A deeper look.
Extended detail on composition, sourcing, authentication and market value.
The physical record
The formula on record is Be2(BO3)(OH,F). Crystal system: Orthorhombic. Specific gravity: 2.35. Streak: White. Cleavage and fracture: Perfect cleavage; brittle.
How it reaches the market
Granite pegmatites: Madagascar, Pamir Mountains (Tajikistan), Myanmar, Norway (type locality area finds).
What it gets confused with
Quartz crystal: Quartz lacks visible facet doubling and cleavage; hambergite shows both. Topaz: Topaz is far denser (SG 3.5); hambergite floats lighter than quartz at 2.35. Danburite: Danburite has wedge terminations and SG 3.0 without strong doubling.
What it is worth
Collector rarity; clean faceted stones fetch strong prices.
Where buyers get caught
Quartz is occasionally mislabeled hambergite; the doubling test exposes it in seconds.
One more thing
Few gems beat hambergite's birefringence, cutters orient it carefully or the stone looks blurry inside, like permanent double vision.
An education-first guide.
We do not carry hambergite. This page exists because the question comes up and the honest answer is worth writing down, whether or not there is anything here to sell you.
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