Every order plants 1 real tree via Tree-Nation.
Highlights & Features
Ancient forests whisper to the stars, turning shadows into silver light. This round cut moissanite ring embodies that stillness with a minimalist 18k gold plated silver setting. Every mining-free gem honors the earth through our 1 Order = 1 Tree mission. Sustainable brilliance, perfected by The Stdiam Standard™
Specifications
| Center Stone | Premium Stdiam™ (D/VVS1) |
| Cut Grade | Excellent (3EX) Hearts & Arrows |
| Metal Base | Solid S925 Sterling Silver |
| Band Width | 2.5mm (Comfort Fit) |
| Plating Standard | 8-Layer 18K Gold Plated (2.5μm Thickness) |
| Setting Type | Master-Hand Micro Setting (Secure Prongs) |
| Refractive Index | 2.65 - 2.69 (Outsparkles Diamond) |
| Skin-Friendly | 100% Lead-Free & Nickel-Free |
| Packaging | Signature Walnut Wood Box |
| Certification | GRA Authenticity Certificate Included |
Choose Your Metal
Swipe to compare →
18K
White Gold Vermeil
18K white gold over 925 sterling silver
The bright look of white gold at an accessible price.
The plating may wear over time, but the similar silver tone beneath makes color changes less noticeable.
BRIGHT WHITE · EVERYDAY VALUE
18K
Yellow Gold Vermeil
18K yellow gold over 925 sterling silver
A beautiful, affordable way to enjoy the rich look of gold.
The gold plating may gradually fade with wear, revealing the silver beneath.
RICH GOLD TONE · EVERYDAY VALUE
10K
Solid White Gold
Solid 10K white gold throughout
A lasting choice for everyday wear, with white gold all the way through.
The surface brightness may soften with wear; beneath the finish, it is still white gold.
SOLID GOLD · WHITE GOLD THROUGHOUT
10K
Solid Yellow Gold
Solid 10K yellow gold throughout
Warm gold color that comes from the metal itself.
As the surface wears, the metal beneath retains its gold tone, with no silver base to show through.
SOLID GOLD · LASTING GOLD TONE
Not sure about your size?
✓If you're between sizes, choose the half size up for comfort
✓Standard US sizing with EU / UK conversion reference
✓Free resizing within 30 days for peace of mind
✓Standard US sizing with EU / UK conversion reference
✓Free resizing within 30 days for peace of mind
Find your closest match using the chart below.
| US / CA MX |
UK / AU IE / NZ / ZA |
FR | DE / RU UA / Asia |
IN / CN / JP SA / TR / IL |
IT / ES NL / CH |
DIA (mm) |
CIRC (mm) |
|---|---|---|---|---|---|---|---|
| 4 | H ½ | 47 | 14.9 | 7 | 7 | 14.9 | 46.8 |
| 4.5 | I ½ | 48 | 15.3 | 8 | 8 | 15.3 | 48.0 |
| 5 | J ½ | 49 | 15.7 | 9 | 9 | 15.7 | 49.3 |
| 5.5 | L | 51 | 16.1 | 11 | 11 | 16.1 | 50.6 |
| 6 | M | 52 | 16.5 | 12 | 12 | 16.5 | 51.9 |
| 6.5 | N | 53 | 16.9 | 13 | 13 | 16.9 | 53.1 |
| 7 | O | 54 | 17.3 | 14 | 14.5 | 17.3 | 54.4 |
| 7.5 | P | 56 | 17.7 | 15 | 16 | 17.7 | 55.7 |
| 8 | Q | 57 | 18.1 | 16 | 17 | 18.1 | 57.0 |
| 8.5 | Q ½ | 58 | 18.5 | 17 | 18 | 18.5 | 58.3 |
| 9 | R ½ | 59 | 18.9 | 18 | 19 | 18.9 | 59.5 |
| 9.5 | S ½ | 61 | 19.4 | 19 | 21 | 19.4 | 60.8 |
| 10 | T ½ | 62 | 19.8 | 20 | 22 | 19.8 | 62.1 |
Fit Tip: If your knuckle is noticeably larger than the base of your finger, we recommend measuring both and choosing a size in between to ensure the ring slips on comfortably.
→ View Full Size Guide & Measure Tips
If it’s not quite right, our hassle-free exchange makes it effortless to get the one that is. We offer ONE FREE RESIZING within 30 days of purchase.
Shipping & Crafting
Crafting Time
Most standard whole sizes (5–9) are crafted within
5–7 business days
.
For the best fit, half sizes and sizes 4, 10 & 11 require additional sizing and finishing steps and typically take 10–15 business days .
For the best fit, half sizes and sizes 4, 10 & 11 require additional sizing and finishing steps and typically take 10–15 business days .
Free Standard Shipping
Worldwide · 150+ countries
7–12 Business Days
VIP Shipping
Available at checkout · $14.90
4–7 Business Days
Delivery estimates apply after dispatch. Crafting time is separate from shipping time.
Risk-Free Purchase
30-Day Returns & Exchanges
Returns and exchanges available within 30 days of delivery.
Lifetime Stone Guarantee
Your center Moissanite is guaranteed for life and will never lose its brilliance.
2-Year Craftsmanship Warranty
Every piece is protected against verified manufacturing defects.
*Note: Excludes normal wear, accidental damage, lost items, and third-party modifications.
Crafted by Masters. Engineered Beyond Tradition
Explore More Collections
Moissanite Guide
Moissanite, Explained.
Clear answers to the questions shoppers ask most about moissanite, from durability and brilliance to long-term care.
Is moissanite a real gemstone or a fake diamond?
Moissanite is a real gemstone with its own chemical composition and optical properties. It is not a type of diamond or a fake diamond.
Modern jewelry-grade moissanite is lab-created for consistency and clarity, with a distinctive brilliance and fire of its own.
What is the difference between moissanite and diamond?
Moissanite and diamond are different gemstones. Diamond is carbon, while moissanite is silicon carbide.
Visually, moissanite often displays more colorful fire, while diamond has its own characteristic balance of white brilliance and dispersion. Both can appear bright and refined, but their optical character is not identical.
Is moissanite durable enough for everyday wear?
Yes. Moissanite measures approximately 9.25 on the Mohs hardness scale, making it highly resistant to scratching and well suited to regular wear.
As with all fine jewelry, the setting and metal should still be protected from hard impacts, abrasive surfaces and strenuous activities.
Does moissanite get cloudy or lose its brilliance over time?
Moissanite does not normally become permanently cloudy with wear. Oils, lotions, soap and everyday residue can temporarily soften its sparkle.
Gentle cleaning can restore its clarity and brilliance, while regular care also helps keep the surrounding metal and settings looking their best.
How should I clean and care for moissanite jewelry?
Clean moissanite jewelry with lukewarm water, mild soap and a soft brush, then rinse thoroughly and dry with a soft, lint-free cloth.
Pay particular attention to the underside of stones and around settings where residue may collect. When not being worn, store your piece separately in its original STDIAM walnut wood box to help reduce contact and rubbing against other jewelry.
For more detailed guidance, visit the STDIAM Jewelry Care Guide .
Why is moissanite more affordable than diamond?
Moissanite follows a different production, supply and pricing structure from diamond. Because jewelry-grade moissanite can be created in a controlled laboratory environment, it can offer substantial visual presence and durability at a lower price point.
The lower price does not make it a lower-quality version of diamond. It is a different gemstone category with its own characteristics.
Can people tell the difference between moissanite and diamond?
The difference can be subtle at a glance, especially once a stone is set in jewelry, but moissanite and diamond are not visually identical.
Moissanite generally shows stronger spectral fire, while diamond has its own characteristic pattern of brilliance. Cut, stone size and lighting can all influence how noticeable those differences appear.
Is moissanite suitable for engagement rings and meaningful jewelry?
Yes. Moissanite combines high durability, distinctive brilliance and a wide range of cuts and settings, making it suitable for engagement rings as well as jewelry chosen for anniversaries, milestones, gifting or everyday wear.
Ultimately, the right choice comes down to the design, materials and character that feel right for you.
J
Amazing!!! She loves it Thank you!
E
The ring feels luxurious yet lightweight. Perfect for everyday or special occasions.
J
I absolutely love my Stdiam ring! I wear it a my travel and work ring and have received lots of compliments on it as it looks nearly similar to my original engagement ring.
A
Love it !! got it to wear on Vacation So not so worried about being Robbed or lost !!
S
This ring is GORGEOUS!! My pictures don’t do it justice! The sparkle is crazy good! Been looking for a moisionette for a long time and this was the one!
k
This ring is everything and more than I was expecting honestly.. I’ve ordered from a few different companies and this ring by far surpasses any others. This ring is SOLID doesn’t feel or look cheap/fake at all. Definitely recommend, it won’t disappoint! I also got the 5 stoned matching band to go with it
M
I've been coveting this ring for a long time, and I finally decided to buy it. This is my dream ring, and I'm so happy! My ring size is 4.5, and it fits perfectly. I wear it with my moissanite anniversary ring that I bought from another seller and my real diamond and sapphire wedding ring. Its sparkle is dazzling; photos and videos simply can't capture its beauty.
K
Omg it's just beautiful..I'm beyond thrilled with this purchase.. it's spactular .You will love this ring!
M
This ring is absolutely stunning! I bought it cuz I read the reviews and for most of the reviews they were positive. I lost my engagement ring the other day and I was so upset. This ring has the same shine mine had.. I just got it today. Hopefully it will last a bit. I wear a nine and it fits a little loose for swollen fingers. It's also sturdy . Nice thick band. I love it!!!
M
Can I give it more than 5 stars? It's my new favorite ring. I'm missing a band, and I'll update this review if it loses stones, but for now I'm going to enjoy it. I love it! The central stone is IMPRESSIVE
A
It’s absolutely beautiful and the fit is perfect
C
I do not do reviews but I had to on this ring. I received this last night and haven't taken it off and don't plan to. I have a 2+ carat diamond engagement ring but never wear it because it constantly flips around on my finger and it was substantially more expensive than this so why go through the hassle when you could possibly damage it? We're going away and decided I would like to start wearing a ring with my wedding band and I have bought rings before that are lightweight or flip so I gave up for a while; now I found the perfect fit and ring!!! It is gorgeous but more than that it is comfortable, has a nice weight to it, doesn't slide around on my finger and is 1000% believable. This is a keeper and I encourage anyone on the fence to go for it.
T
Very nice! I’m happy
C
Fiancee loves it, great quality at an amazing price
R
Great looking ring!
A
Amazing. She loves it.
H
I bought this for. My girlfriend, The quality and the price are amazing!!! Videos/picture don’t do the ring any justice but when you have it on and see it in person it’s sparkles, weight is light not to heavy , and the stone is a moissanite stone and it has the certificates for the stone, and most importantly IT PASSES A DIAMOND TESTER!!!
C
This Moissanite ring is absolutely gorgeous. It shines amazing and It fits well. It is true to size. I love it! A must buy ring!
S
I took this ring to a local jeweler I wanted to have a special coding put on it, the jeweler said that this was a beautiful piece of jewelry, and that you did a wonderful job and that I didn't need to have the coding put on the band
S
I love it
N
This ring is genuinely love a head tuner.
V
Beautiful ring
S
Lovely and it's looks so glitter
M
I tested it with a DIA pen. I tested every stone on the ring. It’s very pretty and I received many compliments. Great buy.
S
I've been wearing this ring for approximately 5 months. Purchased to wear at work so I don't have to worry about damage to my original engagement ring. This still looks stunning, and I am HARD on my jewelry-frequent handwashing, gloves on and off, and all the things. The sparkle is still amazing and I get compliments frequently. It doesn't look fake to me. Wondering why we spent so much money on a real diamond when this one is an excellent dupe!
M
A really stunning piece that doesn't look over the top, fake either. I just received this ring and it fit perfectly and comfortably. I bought this as my gym/travel ring as I don't like to wear my real diamonds when doing either of those things but also hate saying I'm engaged without a ring on my finger. For the $180 this cost, it's worth it. Well packaged, nicely made- would recommend!
- Choosing a selection results in a full page refresh.