How Much Is Obsidian Worth? A Guide to the Prices of Different Obsidian Types

Obsidian can be dirt cheap or surprisingly expensive. It all depends on the type, the size, the finish, and whether the stone has rare color effects that collectors chase.

Common black obsidian is usually affordable. Special varieties, like rainbow, gold sheen, silver sheen, and fire obsidian, can cost much more, sometimes by a wide margin. 

In this guide, I’ll explain everything that affects obsidian’s price, from type, to appearance and skilled (or unskilled) finish.

Let’s dive in!

What is obsidian?

Obsidian is natural volcanic glass. It forms when lava cools so fast that crystals don't have time to grow, which gives it that smooth, glassy look.

Most people picture plain black obsidian, and that's fair. It's the most common type. And of course, black obsidian’s price is among the lowest. But obsidian isn't always plain. Some pieces show brown-red swirls, white "snowflakes," metallic sheen, or layers of color that flash in the light.

That's where pricing can vary vastly.

A basic black rough stone may cost only a few dollars. A flashy fire obsidian gem, cut well and showing strong color, can jump into a completely different bracket. Same family, very different market.

What makes one piece of obsidian cost more than another?

Why can two pieces of obsidian look similar at first glance, yet have totally different prices? Usually, it comes down to rarity, appearance, finish, and buyer demand.

Rarity and special visual effects

This makes the biggest difference for many buyers.

Plain black obsidian is common, so it's usually the least expensive. Once you move into visually unusual material, prices go up. 

Rainbow obsidian can show layered bands of green, purple, gold, or blue under light. 

Gold sheen and silver sheen obsidian can look almost metallic. Fire obsidian is the heavy hitter, prized for its iridescent flashes.

Snowflake obsidian is a little different. It's still fairly available, but the white crystal patterns make it more decorative than plain black, so it often sells for more.

Generally speaking, the stronger and easier the flash is to see, the higher the price usually goes.

Size, cut, and finish

Bigger pieces cost more overall, but not always more for the quality. A small stone with strong flash and a clean polish can cost more per gram than a large but ordinary piece.

Form matters too. Raw chunks are often the cheapest option. Tumbled stones and polished palm stones cost more because of labor. Cabochons, beads, spheres, and carvings move up again because shaping obsidian takes skill and wastes material. Jewelry adds another step, and another markup.

In a way, it’s comparable to wood. A log is cheaper than a carved table, even if they came from the same tree.

Where the obsidian comes from

Origin can affect price, especially for collectors.

Well-known sources like Glass Buttes in Oregon, Glass Mountain in California, and obsidian deposits in Hidalgo, Mexico attract more interest because they're known for quality material and special varieties. 

A seller who can name a respected source, and back it up, may charge more than a seller offering a similar-looking stone with no origin listed.

For most casual buyers, origin isn't always a deal-breaker. For collectors, it can be part of the value.

Obsidian price per kg for the most common obsidian types

If you want the short answer, here it is: common obsidian is cheap, rare obsidian is more expensive. 

This quick table gives you a practical idea of what typical retail prices look like in today's market:

The big takeaway is simple: black, mahogany, and snowflake stay accessible, while rainbow, sheen, and fire obsidian move into collector pricing fast.

Black, mahogany, and snowflake obsidian

These are the varieties most shoppers see first, and they usually give you the best value.

Black obsidian is often the cheapest of the group. Rough material can be sold by the kilogram for very little, and small polished stones are often impulse-buy territory. If a plain black tumble stone is priced like a rare collectible, don’t buy it.

Mahogany obsidian usually costs a bit more. The brown-red pattern gives it more visual appeal, and that helps it stand out from basic black pieces.

Snowflake obsidian tends to sit in the middle. It's still widely available, but those white crystal patterns give it a stronger decorative look, so polished pieces often command a modest premium.

Rainbow, gold sheen, and silver sheen obsidian

This is where obsidian starts acting less like a cheap volcanic glass and more like a collector stone.

Rainbow obsidian is a favorite because the color layers can be dramatic when the stone is cut correctly and viewed at the right angle. Strong flash pushes prices up fast, especially in cabs and polished display pieces.

Gold sheen and silver sheen obsidian also bring higher prices than plain black stone when the reflective layer is obvious. Weak sheen doesn't do much for value. Strong, even sheen does.

Silver sheen pricing is less tidy across listings, but it often lands near gold sheen when the visual effect is clear and attractive.

Fire obsidian and other rare varieties

Fire obsidian is usually the most valuable type in this guide. That's because good material is hard to find, hard to cut, and hard to show well. The color flash can be vivid, but only when the stone is oriented and polished properly.

Small pieces can already be expensive. Large, bright, well-cut examples may need a professional appraisal rather than a quick guess.

You'll also see niche names like: 

• Midnight lace
• Pumpkin
• Cactus
• Electric blue
• Heavenly blue

These can vary a lot in price because the market is smaller and the listings are less standardized. Small polished pieces may start around $20 to $100, while large slabs and standout specimens can run into the hundreds or more.

How Obsidian rock prices change by form, from raw stone to finished jewelry

The same obsidian can be cheap in one form and expensive in another. That catches a lot of buyers off guard.

Raw specimens and rough chunks

Raw obsidian is usually the most affordable way to buy it, especially if you're looking at common black material. Rough chunks are often sold by weight, and the price can be low enough that shipping matters almost as much as the stone.

That said, rough isn't always bargain-bin stuff. A raw piece with unusual color, visible sheen, a striking shape, or a known source can still sell at a premium.

If you're buying for display, rough can be a smart move. You get more stone for the money.

Cabochons, beads, spheres, and carvings

Once obsidian is cut and polished, the price goes up. That's normal.

You're paying for labor, skill, and material loss. A cutter may remove a lot of stone to reveal the best flash or shape. That matters most with rainbow and fire obsidian, where orientation can make or break the final look.

Spheres and carvings often cost more than simple tumbled stones because they take more work. Beads also add labor, especially when sets are matched for color and finish.

Jewelry and gift pieces

Jewelry usually sits at the top of the pricing ladder. A plain obsidian pendant may start around $20, while nicer rings, earrings, and artisan pendants can run $50 to $100 or more. Higher-end pieces can go well past that.

Apart from the obsidian itself, you're also paying for the setting, the metal, the design, and the maker's work.

A black obsidian cab in a simple bezel and a rainbow obsidian cab in handmade sterling silver are not in the same lane, even if both are technically "obsidian jewelry."

How to tell if an obsidian price is fair

You don't need gemologist-level training to spot a reasonable deal. You do need to look past the label.

What to check before you buy

Start with the basics. Look at the color, shine, pattern, polish, and any visible flaws. Ask yourself: does this piece actually show the effect the seller is charging for?

Photos matter a lot here. Good listings show multiple angles, close-ups, and measurements or weight. If the seller calls something "rare rainbow obsidian" but the photos only show plain black stone, that's a red flag.

A fair listing usually tells you enough to compare apples to apples.

When a high price is worth it

Sometimes the higher price is completely fair.

That's usually the case when the stone has strong flash, rare color, a clean surface, good polish, trusted origin, or skilled craftsmanship. Fire obsidian and top rainbow obsidian can justify premium prices when the visual effect is obvious and the cut is well done.

But a high price on common material? That's where patience pays off.

If the stone is ordinary and the seller only uses words like "powerful" or "rare," the price probably isn't doing the talking, the marketing is.

The bottom line: Obsidian value and price depends on type, appearance, and look

Obsidian is one of those stones with a wide price spread. A common black rough chunk can cost almost nothing, while a rare, polished piece with strong flash can become a serious number.

The smart way to shop is simple: 

• Know the type
• Check the form
• Judge the quality in front of you

FAQ

Is obsidian valuable?

Obsidian can be valuable, but most common obsidian is still very affordable. Basic black obsidian is usually cheap, especially as rough material or small polished stones. The value goes up when the stone has rare visual effects, strong color flash, a clean polish, or skilled craftsmanship. 

Is obsidian rare?

Obsidian itself is not rare. Black obsidian is fairly common and widely available, and hence cheap. However, some types of obsidian are much rarer, especially pieces with strong rainbow, gold sheen, silver sheen, or fire-like flashes. 

How much is 1 gram of obsidian worth?

Not much. For common obsidian, 1 gram can be worth only a tiny amount. For example, mahogany obsidian rough material may sell for around $0.02 per gram, while basic black obsidian is significantly less. Finished stones, jewelry, and rare varieties can cost much more per gram because you are also paying for cutting, polishing, design, and rarity.

Is obsidian a precious gem?

No, obsidian is usually not considered a precious gem. It is natural volcanic glass, not a traditional precious gemstone like diamond, ruby, sapphire, or emerald. Still, attractive obsidian varieties can be used in jewelry, carvings, cabochons, and collector pieces. Rare types like fire obsidian or high-quality rainbow obsidian can be very valuable.

What is obsidian price per gram?

The obsidian price per gram depends heavily on the type and form. Common rough obsidian can cost less than a cent per gram. However, polished stones, cabs, jewelry, and rare types with strong flash can have a much higher price of 8 - 10 cents per gram, or even more.

Where does obsidian value come from?

Obsidian value comes from rarity, appearance, size, finish, origin, and craftsmanship. Plain black obsidian is cheap because it’s common. Pieces with rainbow layers, metallic sheen, or fire-like color flashes are worth more because they are harder to find and more visually striking. 

Cut and polish also matter, since a well-finished cabochon, sphere, carving, or jewelry piece takes more skill and labor than a raw chunk.