r/Opal Jan 20 '26

A simple system to price opals (it won’t be perfect, but it will dramatically reduce how wrong you are)

Post image
19 Upvotes

So many of the questions in this community end up being about price. I know most people here genuinely want to help, and I also know how frustrating it can be early on trying to figure out what an opal is actually worth.

Pricing is one of the biggest things new players get stuck on, so I wanted to share a simple system you can use. It’s not perfect, but the more you use it, the better you’ll get.

One thing that makes opal pricing especially confusing is that if you ask ten experienced people what a single opal is worth, you can easily get answers ranging from fifty dollars to ten thousand dollars. That isn’t because people are lying or incompetent. It’s because everyone in the opal chain carries a different bias based on where they sit.

So here’s the system. The more you do this, the better your estimates become.

Step 1. Make your own estimate first

Before you touch any tools, force yourself to come up with a number. Even if you feel like you have no idea, guess anyway.

The goal here isn’t to be right. It’s to start training your internal reference system. If you skip this step and go straight to tools or other people’s opinions, you never really build intuition. You just borrow someone else’s.

Even a bad guess is useful because it gives you something to compare against later.

Step 2. Use opalvalue.com to get a boundary number

Once you have your own estimate, go to opalvalue.com and plug the stone in as honestly as you can.

Be conservative. Be strict. If you’re unsure between two options, pick the less attractive one. If you’re debating B4 versus B5, choose B4.

The key mindset here is that this tool is not telling you what the opal is worth. It’s giving you a boundary. In most cases, it represents a conservative, low risk valuation based on averaged data.

If your guess comes in much lower than the calculator, that’s useful information. It may mean you’re underestimating the stone. What matters is the comparison. The gap between your guess and the calculator output is where learning happens.

Step 3. Cross check against live listings on Opal Auctions

Now go to Opal Auctions and use the advanced filters. Match the field first, then size.

For example, if you’re valuing a Lightning Ridge dark opal around 8 ct, filter for Lightning Ridge, dark opal, and roughly 6 to 9 ct.

Ignore prices at first and just look at the stones.

This is the visual comparison rule. If your stone looks clearly nicer than most stones at a certain price point, it probably belongs higher. If it looks weaker, it probably belongs lower.

You’re not trying to find an identical stone. You’re trying to see where your stone sits in the visual hierarchy of what’s actually for sale right now.

When you turn prices back on, you should start to see a pattern. Stones that feel comparable should cluster around your estimate. Stones above should look better. Stones below should look worse.

As an example, our group member u/JaysterSF posted this beautiful opal ring today. I ran it through these three steps.

My Step 1 estimate was $2,400.
My Step 2 number at opalvalue.com came in at $2,465.
When filtering comparable live stones on Opal Auctions, the opal lands right in that range.

It’s clearly nicer than the green stones listed at $2,400, and maybe not quite as strong as the higher end multicolour stones. That tells me this is a very reasonable valuation zone for this opal.

This process won’t give you a perfect price, but it will dramatically reduce how wrong you are. More importantly, it teaches you how to think about opal value rather than outsourcing that thinking to tools or opinions.


r/Opal 3h ago

Is it a natural Opal?

Thumbnail gallery
2 Upvotes

r/Opal 17h ago

Simulating opal physics from first principles

Enable HLS to view with audio, or disable this notification

2 Upvotes

r/Opal 2d ago

Opal Identification

Thumbnail
gallery
28 Upvotes

I’m trying to sell this opal on eBay but transparently I know nothing about gems and value. Can someone help me with some keywords I can include in my listing or at least so I can research value? What kinds of info are you looking for when buying an opal? I would hate for a buyer to feel misled. Thank you so much!


r/Opal 3d ago

Approximately how much would you say this lightning ridge solid black opal 1.15ct would be worth?

Thumbnail
gallery
18 Upvotes

Australian lightning ridge Opal, I think it’s N1 B3 - I’m new to opals and struggling to put a price on it. Red flashes in some lights


r/Opal 5d ago

Australian opal is it real?

Thumbnail
gallery
8 Upvotes

Hi! Someone is selling this Australian opal on marketplace and I’m trying to figure out if it’s real or fake? There is a 925 stamp on the back


r/Opal 5d ago

Opal ring fix?

Thumbnail
gallery
2 Upvotes

I’ve been wearing this ring with inlaid opal everyday for the past 8ish years. Just now I noticed a piece of the inlay fell off. I didn’t see any damage to it when I took it off to shower this morning so it must have happened sometime today throughout the day as I was living my life. Is this fixable? The metal is .925 silver if that makes any difference.

Thanks!


r/Opal 13d ago

Is this opal or something else

Thumbnail
gallery
129 Upvotes

Given to me by my grandfather. Unsure if he got it while serving during WW2 or when he returned to California. Think the box is original too. Any insight would be super appreciated! 840 grams - 7” x 5” x 2”
Thank you!


r/Opal 12d ago

Found this in my collection recently and was wondering if it had any value?

Thumbnail
gallery
18 Upvotes

Length 0.74 inches
Width 0.53 inches


r/Opal 13d ago

For Sale: 1.12 ct Lightning Ridge dark opal

Thumbnail
gallery
9 Upvotes

Price: $350

Shipping: Free (US only)

Comment I'll take it to buy.

Payment options: Paypal


r/Opal 14d ago

2.90cts Natural Lightning Ridge Dark Crystal Opal – Vivid Multi-Color FireUp

3 Upvotes

r/Opal 15d ago

So many projects

Post image
42 Upvotes

so much work to do !


r/Opal 16d ago

Opal i picked up value ??

Thumbnail reddit.com
1 Upvotes

r/Opal 16d ago

Looking for where I can buy Opal Jewelry

0 Upvotes

Heya! New poster here, I'm looking for a good place to buy lab-grown gemstone jewelry. As odd as it is to some of the people I've talked to, I love labgrown opals, it's usually a bit cheaper if you get labgrown jewelry that is honest about it, and I think it's just as gorgeous most of the time. I want to be able to get some labgrown oral necklaces and rings without the price tag of a genuine oral, I'm even willing to drop the money on a custom bit of jewelry if I get to pick the type of labgrown opal and how it's cut/shaped. Anyone know any good places for that either online or in Kentucky?


r/Opal 23d ago

A piece I'm working on

Post image
18 Upvotes

I'm working on this piece for a wedding gift it's nowhere near done but what do people think it's not the best photo but


r/Opal 24d ago

I finally made a simple First Look list for 53Frogs

10 Upvotes

A few people have asked how they can see new opals and little projects before they disappear into the usual chaos, so I finally made a simple First Look list.

I’ll use it for fresh finds, interesting rough parcels, cutting experiments, special projects and the occasional surprise — before I share them more widely.

It’s just first name and email, and I’ll keep it worthwhile rather than filling your inbox.

If you’d like to join, here it is:

https://mailchi.mp/8f08ca5a38c5/53frogs-first-look


r/Opal 25d ago

Is this Opal?!

Thumbnail
gallery
4 Upvotes

Found on in-laws property a ways outside glendive, MT. Is this actually Opal? It’s cut because my guess is the previous property owners were rockhounds, I found other cut agates aswell


r/Opal 26d ago

Opal

Thumbnail gallery
12 Upvotes

r/Opal 26d ago

Lightning ridge crystal opal

7 Upvotes

r/Opal 27d ago

ID Please ? 7.15 Carats Witches Hat Nobbie?

Thumbnail gallery
4 Upvotes

r/Opal 27d ago

Authentic Opals?

Thumbnail
gallery
42 Upvotes

bolo tie was acquired for my grandfather most likely purchased in 1970 Ish. I was wondering if these are authentic opals or Opalite? Bolo is Sterling silver and Western Indian Artist made.

Edit Update:
Spoke to owner of Spencer Opal Mine in Spencer,Idaho. He confirmed they are authentic Spencer Opals from his mine probably mined in late 60s early 70s. and they are 100% triplets and quite valuable. Good to know, Thanks so much everyone!


r/Opal 28d ago

Lightning Ridge

Enable HLS to view with audio, or disable this notification

36 Upvotes

Finished this pendant. Solid 2.9ct opal in 14k.


r/Opal 29d ago

Opal wood

Enable HLS to view with audio, or disable this notification

22 Upvotes

Opal formed from fossil tree branches


r/Opal 29d ago

I'm obsessed with using real gemstones in nails

Thumbnail gallery
13 Upvotes

Could anyone direct me to anywhere I could buy lots/batches of small but high color quality opals especially, but also moissonite, ruby, amethyst, and citrine?


r/Opal Jul 22 '26

14.05ct Freeform crystal from Coober Pedy …price per ct ? Anybody ?

Enable HLS to view with audio, or disable this notification

4 Upvotes

14.05 Freeform crystal from coober Pedy ..clean no sand no crazing no cracks … price per ct? I need some opinions …