Black Fire Opal Ring | Black Ceramic Band | 4mm
Black fire opal sealed in black ceramic.
Find your ring size
(upright)
Print the sizer at 100% / Actual Size, cut out the strip, wrap it around your finger, and read your size in a minute.
Open the printable sizer (PDF)Turn off "fit to page". The printed ruler should read 80 mm.
| US | Diameter | Circumf. | UK/AU/IE | EU |
|---|
UK, Australia & Ireland share the letter system. European sizes are approximate conversions.

Built for real life, not just photos
Hard-wearing materials, finished by hand — and every ring is backed by our lifetime warranty.
Guess wrong, we fix it free
Free size exchanges — we send a brand-new ring in the right size, with a prepaid return label for the old one.
“I had to exchange it twice due to sizing issues (my fault) and was met with amazing customer service.”
The most meaningful part is hidden
A date. A name. An inside joke no one else will get. Free engraving — a $30 value — inside the band. Shipped in a gift-ready ring box.
“Rings look so beautiful. Engraving of my wedding song is perfect.”

Designed by an aerospace engineer. Run by a family.
Foreverings started in 2017 when our founder left aerospace engineering to make rings the way he made flight hardware — material selection, tolerances, and final finish held to the same standard.
Years later we're still a family business based in Florida. Every ring is inspected by hand before it ships, and every one is engraved free.
The details
Description
This black opal ring sets crushed black fire opal into a polished 4mm black ceramic band. Ceramic has a smooth surface that keeps its finish through everyday contact. The domed comfort fit makes it an easy choice for a wedding band or promise ring. Add free custom engraving with a date, a name, or a word, and it becomes yours alone.
►Material: Ceramic and Crushed Black Fire Opal Inlay
►Color: Black
►Comfort Fit
►Band width: 4mm
►Fit is true to size
►Your crushed opal inlay is protected with a coating that defends it from water, dirt, and grime.
►Fire opal has numerous positive attributes and meanings. The most significant meaning, is a representation of the joy of the heart. It symbolizes passion and love not only for others, but for different elements of life, including careers and hobbies. Fire opal is also representative of good fortune and success.
►Ceramic rings are a very durable wedding ring option. They are made from jewelry-grade ceramic, also known as titanium carbide, and not from the more familiar (and fragile) ceramic used to craft various household items. Ceramic rings are the same color inside and out; therefore, they are not plated and will not lose its color throughout its wear.
✓ 100% Cobalt-Free
✓ Hypoallergenic
✓ Comfort Fit
✓ Free Ring Box
✓ Free Shipping within the US
✓ Ready to ship next business day
►Your ceramic ring will not turn green itself and will not cause your skin to turn green.
►Free USA domestic shipping.
►Delivery Time: 2-5 business days
►Packaged in a gift ready ring box.
►We recommend that you confirm appropriate sizing for rings. Please contact us if you need help sizing.
Specs & materials
| Metal | Ceramic |
|---|---|
| Center stone | Opal |
| Inlay | Black Fire Opal |
| Color | Black |
| Widths | 4mm |
What's included
- Your ring, in the width and size you choose
- Free inside-band engraving — a $30 value
- Gift-ready ring box
- Free US shipping on every order
Shipping, returns & size exchanges
Free US shipping on every order — and if you need it fast, 2-day and overnight options are right at checkout.
Wrong size? No stress. Just reach out and we'll get your exchange or return moving. We'll send you a prepaid return label to make it easy, and we turn things around within about 3 business days of your ring reaching us.
Engraved rings are made just for you, so they can't be returned. Add the Perfect Fit Promise when you order (US orders) and a wrong size is a free exchange: the same ring with the same engraving in your new size, and you keep the original.
A quick heads-up: international orders are final sale. Questions about anything? Check the full Returns & Refunds policy, or just message us — we're happy to help.
Frequently asked questions
Can this ring be resized?
We do something even better — free size exchanges. Instead of cutting and stretching your ring the way traditional resizing does, we simply send you a brand-new ring in the right size. Your ring stays flawless, and the exchange is free.
How does the free engraving work?
Add names, dates, or coordinates — engraved inside the band before it ships, free on every ring (a $30 value). Letters, numbers, punctuation and ♡ ∞ • in our Arial font; any Latin-alphabet language works, but not Cyrillic, Greek, Hebrew, Arabic, Chinese, Japanese, Korean or Thai, and no other emoji. Personalizing your ring adds about three business days, and it's worth every one of them.
What is the inlay made of?
Black Fire Opal — hand-set and sealed under a protective coating that defends it from water, dirt, and grime. Because the stones settle differently in every channel, no two rings are ever alike.
Does it come ready to gift?
Yes — every ring arrives in a gift-ready ring box, with free US shipping on every order. Add the free engraving and it's a finished gift the moment it lands on the doorstep.












