Snowflake Obsidian

Snowflake Obsidian is a black volcanic glass (obsidian) with white to gray “snowflake” spherulites, typically cristobalite, scattered through it.

Pick up a palm stone and you notice it fast: that slick, glassy polish. It’s cool to the touch. But the white patches look oddly soft, like somebody dabbed pale paint into the black and then froze it there. The pattern isn’t some surface stain, either. It’s inside the glass, and when you tip it under a lamp, the flakes don’t budge while the glare slides around on top.

Most material for sale is tumbled, cabbed or carved, because raw chunks are very sharp. Freshly broken rough nodules can have edges that cut skin much like broken bottle glass, often before the cut is noticed. Rough pieces are best stored wrapped in paper or cloth rather than loose in a tray.

Obsidian got used way before anyone bothered to formally describe it, mostly because it breaks in a way that leaves crazy sharp edges, the kind that’ll shave a sliver off your fingertip if you’re careless. That fracture is the whole trick.

The name “obsidian” usually gets traced back to Latin and an old story about someone called Obsidius who was tied to a similar stone, and that’s basically how the modern term ended up sticking in European writing. Not exactly glamorous, but names stick like that.

“Snowflake obsidian,” though, is just a trade name based on how it looks, not a separate mineral species. The little “snowflakes” are spherulites that formed when the glass cooled and devitrified in patches (you can usually feel those spots as slightly different under a fingernail if the surface is polished). Dealers have used the name forever because it sells the look instantly. Why explain what someone can see in two seconds? People spot it and they’re already there.

It shows up in volcanic regions where rhyolitic to dacitic lavas produced obsidian, with classic commercial material coming from the western United States and Mexico.

Obsidian shows up when silica-rich lava chills out so fast the atoms never get a chance to line up into proper crystals. It freezes mid-motion, basically. So instead of a neat crystal lattice, what you’re holding is volcanic glass, with that slick, almost bottle-like shine and edges that can feel scary-sharp if it’s freshly chipped. No crystal system, because there aren’t crystals.

And that’s also why it breaks the way it does. When you snap it, you get that smooth, swooping conchoidal fracture, like curved shell ripples, not blocky faces.

Snowflake obsidian is a little different in the timing. The “snow” doesn’t form right at the instant the glass does. It shows up later, during cooling or even reheating, when tiny crystal bundles start growing inside the glass. Those little burst-looking clusters are called spherulites, and they’re commonly cristobalite, which is a silica polymorph.

On close inspection, some pieces show zones where the flakes thicken and thin out again, or line up in faint bands, as if a brush had been dragged through them. This usually reflects the direction of lava flow or a change in cooling rate. Some pieces look like a blizzard trapped in black glass, while others have only a few flakes, like scattered stars.

Color: Jet black to charcoal gray glass with scattered white to light gray snowflake-like spots or rosettes. The flakes are usually a few millimeters to over a centimeter across depending on the piece.

Luster: Vitreous, glassy luster when polished; dull to sub-vitreous on fresh breaks.

Look closely at the flakes in strong light: in real material they sit inside the glass, not on top, and they don’t smear or fade at the surface like paint or dye. The real test is the break surface on rough pieces: it should show classic conchoidal fracture and wicked sharp edges. And compared to black onyx or dyed agate, obsidian feels more like glass in the hand, with crisp reflections and a slightly “hard” slickness under your thumb.

Snowflake Obsidian is sometimes confused with these materials:

• Apache Tears (black obsidian nodules, sometimes with pale perlite spots that get called “snowflakes” in listings)
• Perlite (gray-black volcanic glass with whitish perlitic rings; gets mislabeled as snowflake obsidian when tumbled)
• Indigo gabbro / “Mystic Merlinite” (black-and-gray mottled igneous rock; pattern is blotchy, not crisp spherulites)
• Dalmatian stone (light feldspar rock with black spots; the color balance is flipped but photos confuse people)
• Dyed crackle glass sold as “snowflake obsidian” (white “flakes” are actually dye sitting in craze lines or etched pits)
• Snowflake “jasper” look-alikes (black chalcedony/jasper with white orbicular spots; usually more waxy than glassy)

It’s safe to handle and it’s fine around water. But the edges can be rough, and some spots get sharp enough to nick your skin if you slide a finger along them. The real day-to-day risk is what happens if it breaks: it can chip, and those little flakes can come off razor-sharp.

Wrap rough pieces up, or tuck them somewhere they can’t bang around against harder stones, and don’t carry raw chunks loose in your pocket (they’ll rattle and chip before you even notice).

Rough/Tumbled: $5 - $60 per piece

Cut/Polished: $1 - $6 per carat

Price usually follows the pattern density, the contrast, and how clean the polish comes out. Big, clean spheres and carvings run higher because the rough has to start off thick and pretty fracture-free, or it’ll crack while you’re shaping it (and you can hear that ugly little “tink” when it goes).

Moderate — Scratch resistance: Fair, Toughness: Fair

It’s stable in normal household conditions, but it can chip on edges and doesn’t love hard knocks the way microcrystalline quartz does.

Use & Storage

Keep it in a pouch or a lined box if it’s polished, and wrap rough pieces so the edges don’t nick other stones. If you stack it with quartz points, the obsidian will usually be the one that comes out with little crescent chips.

Cleaning

1) Rinse with lukewarm water and a drop of mild soap. 2) Wipe with a soft cloth or microfiber and get into carvings with a soft toothbrush. 3) Rinse again and dry fully so water spots don’t dull the shine.

Cleanse & Charge

A quick rinse, smoke cleansing, or leaving it on a shelf away from direct sun all work fine. If you use salt, keep it dry and don’t grind salt against a polished face since it can leave tiny scratches.

Placement

On a desk, it reads as a calm black-and-white pattern rather than a mirror, which suits those who do not want a highly reflective stone. It can look overly glossy when placed beside matte stones.

Caution

Skip ultrasonic cleaners and steam, seriously. And don’t let it tumble onto tile or concrete. Keep an eye on bracelets and rings too, since the edges are where little chips tend to show up first.

Obsidian has been used for tools and blades for thousands of years because it fractures into extremely sharp edges. That history is a common reason crystal traditions link obsidian with protection and with cutting through mental clutter. The snowflake variety is usually described more gently, with its black base and white patches read as order, balance and calm.

In crystal practice, snowflake obsidian is associated with the Root Chakra, the Earth element, and the zodiac signs Virgo and Capricorn. Practitioners often use palm stones for handheld meditation or place pieces on a desk as a reminder to pause. Carved points are often shaped glass and can chip at the tip. For a similar black-and-white look with a softer feel, howlite is a common alternative. These associations are cultural beliefs, not proven effects, and the stone is not a substitute for medical care.