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Hiddenite
Hiddenite is inosilicate (pyroxene, spodumene), LiAlSi₂O₆ + Cr. In the hand, it rates 6.5 to 7 on the Mohs scale, and it runs emerald green and yellow-green. Kunzite's rare green sibling, bladed striated crystals whose green intensifies dramatically looking down their length. The true locality: Hiddenite, North Carolina (USA); chromian green spodumene also from Afghanistan and Brazil (often debated).
The geology.
Hiddenite carries the formula LiAlSi₂O₆ + Cr. It belongs to the monoclinic system. It is classified as inosilicate (pyroxene, spodumene).
It sits at 6.5 to 7 on the Mohs scale. The surface reads vitreous, pearly on cleavage. Light behaviour is transparent to translucent. Specific gravity runs 3.17 to 3.19. The streak is white. It breaks with two perfect cleavages; splintery.
Kunzite's rare green sibling, bladed striated crystals whose green intensifies dramatically looking down their length.
You will most often meet it as striated bladed crystals, faceted or rare tumbled.
The origins.
The true locality: Hiddenite, North Carolina (USA); chromian green spodumene also from Afghanistan and Brazil (often debated).
On value, the database notes: true hiddenite is a prized rarity; commercial 'hiddenite' is affordable spodumene.
Traditional associations.
In energy work traditions, associated with renewal and unconditional compassion.
People buy on this language, so it belongs on the page. It belongs under the facts, though, not over them.
Spotting the real thing.
Kunzite's rare green sibling, bladed striated crystals whose green intensifies dramatically looking down their length.
Much 'hiddenite' sold is pale treated spodumene or green glass; chromium-green Carolina stones are genuinely rare.
| Looks like | How to tell them apart |
|---|---|
| Emerald | Emerald forms hexagonal prisms without spodumene's splintery dual cleavage |
| Green kunzite/spodumene (heated or irradiated) | True chromium hiddenite holds color in light; treated pale-green spodumene fades notably |
| Peridot | Peridot is oilier yellow-green with no strong lengthwise color shift |
At-home tests.
You can run every one of these at a kitchen table. Good light matters more than gear when you are looking at hiddenite.
| Test | What you should see |
|---|---|
| Look down the blade | color deepens (strong pleochroism) |
| By eye | Lengthwise striations with splintery cleavage |
| Scratch check | Scratches glass with effort |
Destructive tests belong to a gemologist, not a kitchen table. If a piece matters to you, pay for an appraisal before you take a file to it.
Care & handling.
At 6.5 to 7 on the Mohs scale it handles careful wear but scratches against quartz and dust. Store it separately and take rings off before rough work.
It breaks with two perfect cleavages; splintery, which is worth knowing before you set it or drop it.
Clean it by hand, dry it properly, and keep it away from ultrasonic cleaners and hot steam.
A deeper look.
Extended detail on composition, sourcing, authentication and market value.
An education-first guide.
We do not stock hiddenite. Writing it up regardless is the point of a reference library.
Explore the Crystal Guide