Raw Stones
271 pieces
Tumbled Stones
202 pieces
Palm Stones
37 pieces
Crystal Points
38 pieces
Clusters & Geodes
63 pieces
Polished & Decor
125 pieces
Mineral Specimens
70 collector pieces
Crystal Chips
22 pieces
Browse everything
Every collection, one page.
View All Collections →
Aries
Mar 21 – Apr 19
Carnelian
›
Taurus
Apr 20 – May 20
Rose Quartz
›
Gemini
May 21 – Jun 20
Agate
›
Cancer
Jun 21 – Jul 22
Moonstone
›
Leo
Jul 23 – Aug 22
Citrine
›
Virgo
Aug 23 – Sep 22
Amazonite
›
Libra
Sep 23 – Oct 22
Blue Lace Agate
›
Scorpio
Oct 23 – Nov 21
Obsidian
›
Sagittarius
Nov 22 – Dec 21
Sodalite
›
Capricorn
Dec 22 – Jan 19
Black Tourmaline
›
Aquarius
Jan 20 – Feb 18
Amethyst
›
Pisces
Feb 19 – Mar 20
Aquamarine
›
Gifting?
A birthday stone is the safe bet.
Read the zodiac guide →
Epididymite
Epididymite is silicates (beryllium sheet-chain silicate), Na2Be2Si6O15·H2O. In the hand, it rates 5.5 on the Mohs scale, and it runs white and colorless. Pearly white tabular crystals and snowball-like sprays from alkaline pegmatites, usually keeping company with black aegirine needles at Mont Saint-Hilaire. Alkaline pegmatites: Mont Saint-Hilaire (Quebec, Canada), Narsarsuk (Greenland), Norway, Malawi.
The geology.
Epididymite carries the formula Na2Be2Si6O15·H2O. It belongs to the orthorhombic system. Catalogues list it as silicates (beryllium sheet-chain silicate).
It sits at 5.5 on the Mohs scale. The surface reads vitreous to pearly. Light behaviour is transparent to translucent. Specific gravity runs 2.55. The streak is white. It breaks with perfect cleavage; brittle.
Pearly white tabular crystals and snowball-like sprays from alkaline pegmatites, usually keeping company with black aegirine needles at Mont Saint-Hilaire.
It reaches buyers as tabular pseudo-hexagonal crystals, spherical aggregates or crystals with aegirine.
The origins.
Alkaline pegmatites: Mont Saint-Hilaire (Quebec, Canada), Narsarsuk (Greenland), Norway, Malawi.
On value, the database notes: collector mineral; Mont Saint-Hilaire specimens are classics of the locality.
Traditional associations.
In energy work traditions, associated with meditation depth and gentle spiritual openings.
We keep this section because people ask. It sits below the geology on purpose, and none of it describes something the stone does.
Spotting the real thing.
Pearly white tabular crystals and snowball-like sprays from alkaline pegmatites, usually keeping company with black aegirine needles at Mont Saint-Hilaire.
Not faked; eudidymite/epididymite labels are often swapped in good faith.
| Looks like | How to tell them apart |
|---|---|
| Eudidymite | Its dimorph twin; visually near-identical, monoclinic, only locality habit and analysis separate them |
| Albite | Albite is harder (6 to 6.5), bladed, and ubiquitous; epididymite spheres are softer and pearlier |
| Natrolite | Natrolite forms slender square prisms with pyramid tips rather than tablets |
At-home tests.
Before anyone talks you into a lab report, these are the checks worth doing yourself on epididymite.
| Test | What you should see |
|---|---|
| Scratch check | Knife scratches it (5.5) |
| By eye | Pearly cleavage flash on tablets |
| Alkaline-rock company | aegirine, analcime, serandite |
Anything that scratches, burns or dissolves the piece is a lab job. Get it appraised rather than testing it apart.
Care & handling.
At 5.5 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 perfect cleavage; brittle, which is worth knowing before you set it or drop it.
Warm water and a soft cloth clean almost everything. Ultrasonic tanks, steamers and household cleaners are where pieces get ruined.
Beryllium-bearing: do not cut or grind without protection; intact specimens are safe to handle.
A deeper look.
Extended detail on composition, sourcing, authentication and market value.
The physical record
The formula on record is Na2Be2Si6O15·H2O. Crystal system: Orthorhombic. Specific gravity: 2.55. Streak: White. Cleavage and fracture: Perfect cleavage; brittle.
How it reaches the market
Alkaline pegmatites: Mont Saint-Hilaire (Quebec, Canada), Narsarsuk (Greenland), Norway, Malawi.
What it gets confused with
Eudidymite: Its dimorph twin; visually near-identical, monoclinic, only locality habit and analysis separate them. Albite: Albite is harder (6 to 6.5), bladed, and ubiquitous; epididymite spheres are softer and pearlier. Natrolite: Natrolite forms slender square prisms with pyramid tips rather than tablets.
What it is worth
Collector mineral; Mont Saint-Hilaire specimens are classics of the locality.
Where buyers get caught
Not faked; eudidymite/epididymite labels are often swapped in good faith.
One more thing
Its name comes from Greek for 'twin upon', a nod to its dimorph eudidymite, two minerals with one recipe discovered as crystallographic siblings.
An education-first guide.
No product links here. We do not sell epididymite, and a guide that only covers our own shelves would not be much of a guide.
Explore the Crystal Guide