The 18K Solid Gold Round Diamond Letter Signet Ringis a personalized and elegant piece, perfect for those who want to add a unique and luxurious touch to their jewelry collection. Crafted from premium 18K Solid Gold, this ring features a bold signet design with the option to customize with a letter of your choice, making it a meaningful and stylish accessory. The round design adds a classic appeal, while the diamond detailing provides an extra sparkle, elevating the overall aesthetic.
This signet ring is a timeless piece that can be worn daily or on special occasions, offering both personalization and luxury.
 
Product Details :
 
Metal: 18K Solid Gold (Available in White ,Rose Gold and Yellow Gold)
Diamond Type: Moissanite Diamond (if applicable)
Certifications GIA Certified & BIS Hallmarked
Shipping Time 4 business days to make and dispatch, plus about 4 business days in transit (around 8 business days total)und 8 business days total)
Customer Support: Available via live chats, and video calls.

Frequently Asked Questions
Is a signet diamond ring a good everyday piece?
Yes. Diamond rates 10 on the Mohs hardness scale, and set in solid gold, this signet ring holds up well to daily wear.
What's the price range for this signet diamond ring across different gold karats?
At The Karat Store, this signet diamond ring starts at $1,014 in 10K gold, $1,144 in 14K gold, and $1,300 in 18K gold — all solid gold, not plated.
Should I choose 10K, 14K, or 18K gold for this ring?
18K gold (75% pure) has the richest color and softest feel. 14K gold (58.3% pure) is the most popular balance of durability and value. 10K gold (41.7% pure) is the most affordable and most scratch-resistant.
How can I tell this is real solid gold and not gold-plated?
This ring is solid gold throughout, not gold-plated — the karat purity runs all the way through the metal, not just a surface layer. Unlike plated jewelry, it won't flake, discolor, or expose base metal over time, and it carries a karat hallmark stamp as proof of authenticity.
Can this ring be resized?
Yes. Select your ring size from the dropdown before checkout. If you're unsure of your size, we recommend visiting a local jeweler for an accurate measurement.
How do I clean and care for this ring so it lasts?
Clean every few weeks with warm water, a mild soap, and a soft brush, then dry thoroughly. Avoid chlorine, harsh chemicals, and ultrasonic cleaners, and store the ring separately to prevent scratching.
Ring Silhouette: Signet
Available Metal Colours: Yellow Gold, White Gold, Rose Gold
Available Ring Sizes: US 2 to US 13 in quarter-size increments (45 sizes)
Explore more: Diamond Rings | Gold Rings | Round Cut Jewelry | Shop All Solid Gold Jewelry
Helpful guide: How to find your ring size