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The 18K Solid Gold Three Stone Marquise Lab-Grown Diamond Engagement Ring is a striking piece of fine craftsmanship that celebrates love and elegance. At its heart is a stunning 2-carat round lab-grown diamond, certified by IGI for its exceptional quality. With F color, VS2 clarity, and a Super Cut grade, this centerpiece shines with unmatched brilliance and fire, making it a timeless representation of your most meaningful moments. Its excellent luster ensures a dazzling sparkle that captures attention from every angle.
Complementing the center stone are six additional lab-grown diamonds in a mix of marquise and princess shapes, with a total carat weight of 0.74. These side stones enhance the design’s sophistication and lend a unique flair to the ring, creating a harmonious balance between modernity and tradition. Crafted from 18K Solid Gold, the band is elegantly slim with a width of 2.1 mm and a height of 1.5 mm, ensuring both durability and refinement. The absence of rhodium plating showcases the natural warmth of the gold, adding a timeless charm.
Designed with a comfort-fit band, this ring is ideal for both daily wear and special occasions. The use of ethically sourced lab-grown diamonds ensures that this piece is as sustainable as it is luxurious, making it a perfect choice for the modern romantic.
 
Product Details:
 
Main Stone: Lab-Grown Diamond
Center Stone Carat Weight: 2ct
Center Stone Color: F
Center Stone Clarity: VS2
Cut Grading: Super Cut
Center Diamond Brilliance: Excellent
Side Stones: Lab-Grown Diamonds (6)
Side Stone Shape: Princess, Marquise
Side Stone Carat Weight: 0.74ct
Metal: 18K Solid Gold (Available in White ,Rose Gold and Yellow Gold)
Rhodium Plating: No
Band Width: 2.1 mm
Band Height: 1.5 mm
Band Fit: Comfort
Certifications: IGI Certified & BIS Hallmarked
Shipping Time: 4 business days to make and dispatch, plus about 4 business days in transit (around 8 business days total)
Customer Support: Available via live chats, and video calls.

Frequently Asked Questions
Is a lab-grown diamond as good as a natural diamond?
Yes — lab-grown diamonds are chemically, physically, and optically identical to natural diamonds, both rating 10 on the Mohs hardness scale. The difference is origin, not quality: lab-grown diamonds are created in a controlled environment rather than mined, which is why a 3 carat lab-grown stone costs significantly less than a natural one of the same size and quality.
What's the price of this Marquise Three Stone lab-grown diamond ring across different gold karats?
At The Karat Store, this Marquise Three Stone lab-grown diamond ring starts at $2,410.20 in 10K gold, $2,719.20 in 14K gold, and $3,090 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 — a practical choice to pair with a 3 carat center stone.
Is this ring solid gold all the way through, or just gold-plated?
This ring is solid gold throughout, not gold-plated — the karat purity runs all the way through the metal. 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.
Is this ring durable enough for everyday wear?
Yes. Diamond — lab-grown or natural — rates 10 on the Mohs hardness scale, the hardest natural material, making it exceptionally durable for daily wear as an engagement ring.
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 for the gold setting, and store the ring separately to prevent scratching.
Ring Silhouette: Three-stone
Available Metal Colours: Yellow Gold, White Gold, Rose Gold
Available Ring Sizes: US 2 to US 13 in quarter-size increments (45 sizes)