Black Opal for Sale

About black opal

Black opal is the rarest opal in the world. There’s basically one place it comes out of the ground in any volume, and that’s Lightning Ridge in outback New South Wales. The fields are old now, the mines run deep, and even on a good day most of what gets pulled up isn’t worth cutting. The stones on this page are the ones that were.

What makes black opal what it is, is the natural dark backing the color sits against. Most opal in the world has a pale or milky body. Hold a flash of red against a milky body and it looks soft. Hold the same red against a black body and it lights up like a screen. That’s the whole appeal in one sentence. Every stone here is solid, natural, untreated. No doublets. No triplets. Nothing smoked, nothing dyed.

How we grade an opal

You’ll see plenty of opal sites grade their stones on a chart that runs N1 through N9, jet black down to white. The shorter the number, the darker the stone, the higher the implied price. We don’t use the chart. Neither does GIA, neither does GRS, neither does IGI. The three labs that actually grade gems for a living grade by eye. So do we. And so will you, when the stone is in your hand.

What we look at

How bright is the fire, and does it hold across the face of the stone or only fire in one spot? A stone that needs a torch to come alive isn’t a stone we list.

What color is the fire. Red is the rare one. Top quality red on a black body is where the money lives, and the highest we’ve personally sold at is fifteen thousand US dollars per carat. Orange is next. Green and blue are common but can still be electric. Most stones show a mix.

What’s the pattern. Rolling flash, Chinese writing, the very occasional harlequin. A clean, organised pattern is worth more than scattered pinfire even when everything else about the stone is the same.

Then size, last. A small stone with the colors screaming at you will beat a big stone with dead patches every time.

Where our opals come from

The Ridge isn’t one mine. It’s a scatter of fields across hundreds of square kilometres of red dirt, and each field cuts a different kind of stone. Grawin and Mulga are seam fields. The opal lies in flat bands and the color stretches in broad sheets. Coocoran and Allawah are nobby fields. The opal forms in lumps and the color packs tighter. Allawah is the place for the pink stones, the ones you don’t really see coming out of anywhere else on the Ridge. T Bone country runs blacker in body tone than you’ll find a few miles down the road. The list goes on.

We buy across all of them. A collection sourced from one mine has one personality. Bought across the Ridge, the geology shows up in the stones, and the buyer ends up with options that look like the Ridge actually looks, not like one cutter’s preferences.

The miners we work with are mostly people we’ve known a long time. Twenty years in some cases, predating Opal Galaxy as a website. We also have our own cutters and miners who live in town. That’s the part most online sellers can’t replicate, and it changes everything. Here’s why. A miner who’s just hit good rough wants two things. Cash now, and to get back underground tomorrow. So the best rough goes fast, in town, to whoever’s standing there with money. By the time a parcel shows up on a website somewhere it’s been through three sets of hands and each of those hands took the best stones for themselves first. We’re the first set of hands. That’s the whole game.

A note on Ethiopian “black opal”

This is the bit most sites don’t say out loud, but it matters more than anything else if you’re buying for the first time. In the last decade or so the market has filled up with so called black opal from Ethiopia that’s been smoked, dyed, or treated with sugar acid to artificially darken the body. The treatment is good enough to fool most buyers and the price reflects that. Treated Ethiopian material wholesales for about ten dollars per carat. Untreated Australian black opal of comparable look is worth hundreds or thousands of times that.

The rule of thumb. If the listing isn’t explicit about the stone being natural, solid, untreated, and Australian, walk away. If the price looks wildly cheap, walk faster. Every stone we sell can be authenticated by us personally. We can provide a digital certificate naming origin, type and treatment status by request. We’ve never sold a treated stone. We never will.

What’s in the collection

The main category here is solid black opal. Opal all the way through, ready for fine jewelry or a collector’s drawer. Black crystal opals are the same Lightning Ridge material but translucent in body, so the color comes from inside the stone instead of off the surface. Rarer than either fully opaque black or fully clear crystal. Dark opals are the lighter cousin. Same source, slightly paler body, gentler contrast, considerably more affordable. If you’re buying your first real Lightning Ridge stone, dark opal is often where a lot of people start. We also cut matched pairs for earrings and assemble parcels for jewellers buying in volume.

Who we are

Opal Galaxy is two people, Yuka Hatano and Michael Shepherd. Yuka left Oita, Japan in 2012 to learn about Opal in Australia. Michael was born in Australia and had an eye for these beautiful gemstones from a young age. Both of us are Pro Members of the International Gem Society and members of the Opal Association. Opal Galaxy is a registered trademark in Australia. Every stone on this site has been physically in our hands. We don’t list things we haven’t seen. The full story is on the about us page if you want to have a read.

Shipping, payment and guarantees

Worldwide shipping, every order, fully insured. Registered post is free over two hundred and one US dollars. EMS Express is complimentary over a thousand. FedEx is complimentary over four thousand. For US buyers we cover tariffs at our end, so the price you pay is the price you pay.

For anything over a thousand dollars we offer payment plans with no interest, via PayPal. Twenty five percent down, the rest over four weeks. Bank transfer on anything over two thousand saves you five percent. We accept cards through Stripe, PayPal directly, bank transfer, and cryptocurrency.

We back every stone with our Best Price Guarantee and a lifetime guarantee against natural cracks forming after you’ve bought the stone. Anything already in the stone is disclosed up front on the listing. If a stone arrives and it isn’t what you hoped, we’ll make it right.

Browse what’s available above, or use Help Me Choose and we’ll talk you through it.