9 Best Opal-and-diamond Signet Rings Jewelers Endorse
Opal-and-Diamond Signet Rings: The 9 Best Picks Jewelers Love Right Now
I still remember the first time I slipped an opal-and-diamond signet ring onto my finger. The cool weight of precious metal, the shimmer of diamonds, the mesmerizing play-of-color from the opal—it’s a sensory experience that never gets old. The way the stones catch the light, sending flashes of blue, green, and fire across your hand, is truly magical. It’s like wearing a tiny piece of art that’s both beautiful and meaningful.
But with so many options out there, how do you choose the perfect one? I’ve spent hours watching top jewelry YouTubers—think Gem Goddess, Julia Engel, and Cassandra Bankson—break down what makes a signet ring special. I’ve tried on dozens myself, and I’m excited to share my nine favorite opal-and-diamond signet rings, all recommended by expert jewelers and real influencers who have impeccable taste.
If you’re shopping for a ring that feels both timeless and unique, let’s dive in! Whether you love bold statement pieces or prefer subtler styles, you’ll find something here that fits your vibe and lifestyle.
1. Catbird Opal-and-Diamond Signet Ring
Why It Stands Out
Catbird’s Opal-and-Diamond Signet Ring is a work of art. It features a luminous Australian opal set flush with three sparkling white diamonds on either side, all nestled in recycled 14k yellow gold. The ring is dainty enough for daily wear, yet substantial enough to feel luxurious.
- Materials: 14k recycled yellow gold, genuine Australian opal, six white diamonds (0.09ct total)
- Dimensions: Top measures 8mm x 6mm; band width tapers from 4mm to 1.5mm
- Colors Available: Yellow gold only
My Experience
I wore this ring on a weekend getaway and got so many compliments at brunch. The opal glowed in natural light, and the diamonds added just enough sparkle without feeling flashy. It’s comfortable for stacking but also stunning worn solo.
Style & Functionality
Catbird’s craftsmanship is legendary in YouTube jewelry reviews. Their pieces last, even with daily wear. This ring is perfect for those who want understated elegance and ethical sourcing.
2. Mejuri Bezel Opal Diamond Signet Ring
Why It Stands Out
Mejuri’s version is sleek and modern, with a bezel-set oval opal flanked by two small round diamonds. The setting is low-profile and smooth—no snagging on sweaters here!
- Materials: 14k solid gold, lab-grown diamonds (0.04ct), natural opal
- Dimensions: Opal 7mm x 5mm; band width 2mm
- Colors Available: Yellow gold only
My Experience
I love how this ring feels cool against the skin. It’s lightweight but sturdy, and the lab-grown diamonds are impressively bright. If you’re active (or just clumsy like me), this is a practical choice that doesn’t sacrifice style.
Style & Functionality
Mejuri is all about effortless luxury. Their signet rings are regularly praised by YouTubers like Gem Goddess for their wearability and minimalist vibe.
3. Stone and Strand Opal Heart Signet Ring
Why It Stands Out
This ring is playful and romantic—a heart-shaped opal surrounded by pavé-set diamonds on a thick gold band. It’s perfect if you love bold jewelry with personality.
- Materials: 10k solid gold, natural white opal, white diamonds (0.10ct)
- Dimensions: Heart opal is 8mm x 8mm; band width 4mm
- Colors Available: Yellow gold only
My Experience
I wore this to a friend’s birthday dinner and it was a conversation starter. The heart shape feels whimsical but the quality is pure luxury. The diamonds are tiny but pack a punch in terms of sparkle.
Style & Functionality
Stone and Strand gets rave reviews for making statement pieces that still feel wearable every day. This ring looks amazing with casual outfits or dressed up for date night.
4. Anna Sheffield Opal Bea Signet Ring
Why It Stands Out
Anna Sheffield’s Bea Signet Ring is inspired by Victorian designs but with a modern twist. Its central opal cabochon is surrounded by eight petite diamonds in an octagonal gold frame.
- Materials: 14k recycled yellow gold, Australian opal, white diamonds (0.12ct)
- Dimensions: Face measures 10mm x 8mm; band width 2mm
- Colors Available: Yellow gold or rose gold
My Experience
The octagon shape is so unique—I get asked about it every time I wear it! The opal shifts colors depending on the light, which feels almost magical. This ring has become my go-to for special occasions.
Style & Functionality
Anna Sheffield is beloved by jewelry experts for her vintage-inspired aesthetic. Her rings are heirloom quality and look amazing stacked or worn alone.
5. Sophie Buhai Opal Signet Ring with Diamonds
Why It Stands Out
Sophie Buhai’s designs are all about sculptural simplicity. This signet ring features an oval opal cabochon framed by tiny flush-set diamonds in sterling silver—a rare find if you prefer cooler-toned metals.
- Materials: Sterling silver, white diamonds (0.06ct), Australian opal
- Dimensions: Face measures 12mm x 10mm; band width 4mm
- Colors Available: Sterling silver only
My Experience
I appreciate how this ring feels substantial but not heavy. The cool silver sets off the play-of-color in the opal beautifully. It slides easily onto my index finger for that fashion-forward look YouTubers love.
Style & Functionality
Sophie Buhai’s rings are perfect if you want something artsy yet practical—the silver is less prone to scratches than softer gold alloys.
6. Grown Brilliance Opal-and-Diamond Halo Signet Ring
Why It Stands Out
This ring brings drama! A large oval Ethiopian opal sits at the center, encircled by a halo of round lab-created diamonds on a thick gold band. It’s pure glamour without being over-the-top.
- Materials: 14k recycled yellow gold, Ethiopian opal (8mm x 6mm), lab-grown diamonds (0.20ct)
- Dimensions: Face measures 10mm x 8mm; band width 3mm
- Colors Available: Yellow gold or white gold
My Experience
When I want to make a statement—think holiday parties or weddings—this is my pick. The halo effect really amplifies the brightness of both the opal and the diamonds.
Style & Functionality
Grown Brilliance gets glowing reviews from YouTube experts like Cassandra Bankson for their bold designs that don’t compromise comfort.
7. Brilliant Earth Opal Signet Ring with Diamonds
Why It Stands Out
Brilliant Earth’s ethically sourced pieces are favorites among sustainability-minded influencers. This signet ring showcases an oval opal with two baguette-cut diamonds set into each shoulder.
- Materials: Recycled 14k yellow gold or platinum, Australian opal, baguette white diamonds (0.08ct)
- Dimensions: Face measures 9mm x 7mm; band width tapers from 4mm to 2mm
- Colors Available: Yellow gold or platinum
My Experience
This ring feels delicate but sturdy—I wear it almost every day and it still looks brand new! The baguette diamonds add a geometric touch that’s super chic.
Style & Functionality
Brilliant Earth rings are known for their ethical sourcing and timeless elegance—a combo that resonates with women who want style with substance.
8. Noémie Opal-and-Diamond Classic Signet Ring
Why It Stands Out
Noémie takes classic signet styling and gives it a glow-up with a rectangular Australian opal flanked by two round brilliant diamonds on each side.
- Materials: 18k recycled yellow gold, Australian opal (10mm x 7mm), white diamonds (0.16ct)
- Dimensions: Face measures 12mm x 9mm; band width tapers from 5mm to 2mm
- Colors Available: Yellow gold only
My Experience
If you want something bold but still refined, this is it. The rectangular shape feels modern and the setting sits flush against your finger for comfort.
Style & Functionality
Noémie’s pieces get consistent praise for their craftsmanship and attention to detail from YouTube jewelry channels like Julia Engel.
9. Kimaï Opal-and-Diamond Pinky Signet Ring
Why It Stands Out
Kimaï brings Parisian chic to the signet game with this petite pinky ring featuring a round opal and two tiny lab-grown diamonds on each side.
- Materials: Recycled 18k yellow gold, Australian opal (5mm), lab-grown diamonds (0.02ct)
- Dimensions: Face measures 7mm; band width tapers from 3mm to 1mm
- Colors Available: Yellow gold only
My Experience
I adore this as a pinky ring—it feels dainty but still makes an impact with its sparkling stones. Perfect for stacking or as a subtle statement on its own.
Style & Functionality
Kimaï’s rings are beloved by European influencers for their sustainable materials and delicate style—great for those who want “just a touch” of glamour.
How to Choose Your Perfect Opal-and-Diamond Signet Ring
Shopping for jewelry online can be overwhelming, especially when every piece looks gorgeous on screen! Here’s what top YouTubers recommend when picking an opal-and-diamond signet ring:
What to Look For:
- Stone Quality
Choose rings with genuine Australian or Ethiopian opals—their play-of-color (flashes of green, blue, pink) should be visible even in low light. - Diamond Cut & Setting
Tiny round or baguette-cut diamonds add sparkle but shouldn’t distract from the opal itself. - Metal Choice
Yellow gold feels classic; white gold or platinum looks modern; sterling silver offers cool-toned freshness. - Comfort & Fit
Look for rounded bands and low-profile settings if you’ll wear your ring daily. - Ethical Sourcing
Opt for recycled metals and certified stones if sustainability matters to you. - Band Width & Shape
Wider bands make a bold statement; tapered bands are comfier for stacking. - Size & Placement
Decide whether you want your signet on your index, middle finger, or pinky—measure carefully!
Buying Tips From Jewelry Influencers
Always check reviews on both jeweler websites and YouTube before ordering.
Look for close-up video shots so you can see the stone quality and size against real hands.
If possible, order in advance—custom sizing can take weeks! And don’t forget to measure your finger at midday (temperature affects swelling).
FAQ: Your Questions Answered
Can I wear my opal-and-diamond signet ring every day?
Absolutely! Most rings here use sturdy settings designed for daily wear—but avoid harsh chemicals or rough activities to keep stones safe.
Are these rings good for stacking?
Definitely! I love mixing dainty opals with thicker bands or pairing them with plain gold rings for contrast.
How do I clean my ring?
Use gentle soap and warm water; avoid ultrasonic cleaners (they can damage opals). Dry thoroughly before storing.
Will opals lose color over time?
Natural opals can dry out if exposed to heat or chemicals—store them in soft pouches and avoid prolonged sun exposure.
What if my size isn’t listed?
Most jewelers offer custom sizing—just reach out before ordering!
Final Thoughts: Why Opal-and-Diamond Signet Rings Are Worth It
Wearing an opal-and-diamond signet ring feels special—like carrying a little piece of history mixed with modern flair. Each piece on this list has been vetted by top jewelry YouTubers and tested by me personally in real-life scenarios.
Whether you want a statement piece for events or something understated for everyday wear, there’s an option that fits your style, budget, and values. Don’t be afraid to treat yourself—you deserve jewelry that makes you feel beautiful every single day!