Buy 3 Ct Lab-Grown Diamond Engagement Ring
When you're ready to make a grand gesture of love, only the boldest brilliance will do. Our 3 Ct lab-grown diamond engagement ring , crafted in 100% solid 14K & 18K gold, are designed to impress—without compromising your values. With IGI-certified lab-grown diamonds, these rings offer exceptional sparkle, clarity, and size—at a price that's smart, not inflated.
Each piece is handmade, hypoallergenic, and shipped free across the USA, complete with full certification and luxury packaging. At The Karat Store, we believe your forever ring should be as breathtaking as your story.
14 K Solid Gold 3ct Pear Cut lab Grown Diamond Engagement Ring
14k Gold 2.2ct Lab Grown Diamond Engagement Ring
A 2.2ct lab-grown diamond engagement ring with 8 delicate side stones, crafted in 14K solid gold for timeless brilliance.
14k Gold 2.5Ct Lab Grown Diamond Engagement Ring
A 2.5-carat lab-grown diamond engagement ring in 14K solid gold, featuring a 2-carat F VS2 center diamond and 38 round side stones. IGI & BIS hallmarked.
14k Gold 2.5Ct Round Shape Lab Grown Diamond Ring
A breathtaking 14K Solid Gold Ring featuring a 2ct Super Cut lab-grown diamond (F color, VS2 clarity) with 23 sparkling side stones. Available in white, rose, or yellow gold, this elegant ring is perfect for engagements and special occasions.
14k Gold 2.5ct Solitaire Lab Grown Diamond Engagement Ring
14K Gold 2.6ct Emerald Cut Lab Grown Diamond Engagement Ring
14k Gold 3ct Lab Grown Diamond Engagement Ring
14k Gold Lab-Diamond Engagement Ring
14k Gold Three Stone Pear & Round Lab Grown Diamond Ring
14K Solid Gold 3ct Solitaire Lab Grown Diamond Ring
14K Solid Gold Three Stone Lab Grown Diamond Ring
14K Solid Gold U Shape Lab Grown Diamond Engagement Ring
A 2-carat lab-grown diamond engagement ring in 14K gold, featuring a U-shape prong setting with 12 accent diamonds (3ct total) for extra brilliance.
14K Solid Gold 2.5 Ct Emerald Cut Halo Ring Lab Grown Diamond Engagement Ring
14K Solid Gold 2.5ct Emerald Cut Lab Grown Diamond Ring
14K Solid Gold 2.5ct Oval Shape Lab Grown Diamond Engagement Ring
14K Solid Gold 2.5ct Pear Cut lab Grown Diamond Engagement Ring
14K Solid Gold 2.5CT Round Shape Lab Grown Diamond Engagement Ring
A stunning 2.5CT lab-grown diamond engagement ring featuring a 2Ct F VS2 center stone with five side diamonds (0.43CTW) in round & baguette cuts, set in 14K solid gold. Available in white, rose, and yellow gold with a comfort-fit band.
14K Solid Gold 2.5ct Soitaire Lab Grown Diamond Engagement Ring
14K Solid Gold 2.5ct Solitaire Lab Diamond Engagment Ring
The 14K Solid Gold 2.5ct Solitaire Lab Diamond Ring features a 2ct Super Cut F color, VS2 clarity lab diamond with 0.42ct side diamonds, set in a micro-prong 14K gold band.
14K Solid Gold 2.5ct Solitaire Lab Grown Diamond Ring
14K Solid Gold 2.6ct Lab Grown Diamond Engagment Ring
14K Solid Gold 2.6ct Oval Shape Lab Grown Diamond Engagement Ring
14K Solid Gold 2.6ct Oval Shape Lab Grown Diamond Engagement Ring
14K Solid Gold 2.6ct Solitaire Lab Grown Diamond Engagement Ring
14K Solid Gold 2.6ct Solitaire Lab Grown Diamond Engagment Ring
14K Solid Gold 2.71ct Oval Shape Lab Grown Diamond Engagement Ring
14K Solid Gold 2.7ct Emerald Cut Lab Grown Diamond Engagement Ring
14K Solid Gold 2.7ct Solitaire Lab Grown Diamond Engagement Ring
14K Solid Gold 2.7ct Solitaire Lab Grown Diamond Engagement Ring
14K Solid Gold 2.7ct Solitaire Lab Grown Diamond Engagment Ring
14K Solid Gold 2.8ct Lab Grown Diamond Engagement Ring
14K Solid Gold 3 Ct Emerald Cut Halo Lab Grown Diamond Engagement Ring
14K Solid Gold 3.5ct Pear Cut lab Grown Diamond Engagement Ring
14K Solid Gold 3ct Halo Lab Grown Diamond Ring
A luxurious 3ct halo lab-grown diamond ring in 14K solid gold, featuring a 2ct round-cut diamond and 56 side stones (1.02ct total). Available in white, rose, and yellow gold. BIS & IGI Certified.
14K Solid Gold 3ct Oval Shape Lab Grown Diamond Engagement Ring
14K Solid Gold 3ct Round Lab Grown Diamond Ring
14K Solid Gold 3ct Solitaire Lab Grown Diamond Ring
A 2-carat solitaire lab-grown diamond ring with 94 round diamonds (1.04ct) in solid 14K gold. BIS Hallmarked & IGI Certified for unmatched brilliance.
14K Solid Gold Halo Lab Grown Diamond Engagement Ring
14K Solid Gold Halo Lab Grown Diamond Ring
14K Solid Gold Halo Lab Grown Diamond Ring
14K Solid Gold Infinity Lab Grown Diamond Engagement Ring
14K Solid Gold Nature Inspired Lab Grown Diamond Ring
14k Solid Gold Oval Cut Lab-Grown Diamond Ring
14K Solid Gold Round Shape Lab Grown Diamond Engagement Ring
14K Solid Gold Solitaire Lab Grown Diamond 3ct Engagement Ring
14K Solid Gold Solitaire Lab Grown Diamond Engagement Ring
14K Solid Gold Solitaire Lab Grown Diamond Engagement Ring
14K Solid Gold Solitaire Lab Grown Diamond Engagement Ring
14K Solid Gold Three Stone Emerald Shape Lab Grown Diamond Ring
A 14K gold three-stone ring featuring a 2ct super-cut round lab-grown diamond, accented by 1.19ct of round and emerald-cut side diamonds. Available in white, rose, and yellow gold.
14K Solid Gold Three Stone Half-Moon Lab Grown Diamond Engagement Ring
A luxurious 14K gold three-stone engagement ring, featuring a 2ct oval lab-grown diamond (F color, VS2 clarity) with 1.46ct half-moon side diamonds in a prong setting. IGI & BIS Hallmarked, available in White, Rose, and Yellow Gold.
14K Solid Gold Three Stone Lab Grown Diamond Engagement Ring
14K Solid Gold Three Stone Lab Grown Diamond Ring
14K Solid Gold Three Stone Pear & Round Lab Grown Diamond Engagement Ring
14K Solid Gold Three Stone Pear & Round Lab Grown Diamond Ring
14K Solid Gold Three Stone Pear Lab Grown Diamond Engagement Ring
14K Solid Gold Three Stone Round Lab Grown Diamond Engagement Ring
A stunning 14K solid gold three-stone engagement ring, featuring a 2-carat round lab-grown diamond with 1.25 carats of side diamonds. Available in white, rose, and yellow gold.
14K Solid Gold Three Stone Trapezoid Lab Grown Diamond Engagement Ring
14K Solid Gold Three Stone Triangle Lab Grown Diamond Engagement Ring
14K Solid Gold Three Stone Triangle Lab Grown Diamond Engagment Ring
14K Solid Gold Three-Row Lab Grown Diamond Engagement Ring
14K Solid Gold Three-Row Lab Grown Diamond Engagment Ring
A 2-carat lab-grown diamond ring with three rows of round diamonds (1.12ct) in solid 14K gold. BIS Hallmarked & IGI Certified for exceptional brilliance.
14K Solid Gold Toi et Moi Engagement Ring
14K Solid Gold Trapezoid Round Shape Lab Grown Diamond Engagement Ring
A striking 14K gold ring featuring a 2 ct round lab-grown diamond accented by trapezoid-shaped diamonds (1.48 ct total). IGI & BIS certified.
18k Gold 2.2ct Lab Grown Diamond Engagement Ring
A 2.2ct lab-grown diamond engagement ring with 8 delicate side stones, crafted in 18k solid gold for timeless brilliance.
18k Gold 2.5Ct Lab Grown Diamond Engagement Ring
A 2.5-carat lab-grown diamond engagement ring in 18k solid gold, featuring a 2-carat F VS2 center diamond and 38 round side stones. IGI & BIS hallmarked.
18k Gold 2.5Ct Round Shape Lab Grown Diamond Ring
Get this Product in 14K Gold
A breathtaking 18k Solid Gold Ring featuring a 2ct Super Cut lab-grown diamond (F color, VS2 clarity) with 23 sparkling side stones. Available in white, rose, or yellow gold, this elegant ring is perfect for engagements and special occasions.
18k Gold 2.5ct Solitaire Lab Grown Diamond Engagement Ring
18k Gold 2.6ct Emerald Cut Lab Grown Diamond Engagement Ring
18k Gold 3ct Lab Grown Diamond Engagement Ring
18k Gold Buguette & Round Shape Lab Grown Diamond Engagement Ring
18k Gold Lab-Diamond Engagement Ring
18k Gold Three Stone Pear & Round Lab Grown Diamond Ring
18K Solid Gold 2.5 Ct Emerald Cut Halo Ring Lab Grown Diamond Engagement Ring
18K Solid Gold 2.5ct Emerald Cut Lab Grown Diamond Ring
18K Solid Gold 2.5ct Oval Shape Lab Grown Diamond Engagement Ring
18K Solid Gold 2.5ct Pear Cut lab Grown Diamond Engagement Ring
18K Solid Gold 2.5CT Round Shape Lab Grown Diamond Engagement Ring
18K Solid Gold 2.5ct Soitaire Lab Grown Diamond Engagement Ring
18K Solid Gold 2.5ct Solitaire Lab Diamond Engagement Ring
The 18k Solid Gold 2.5ct Solitaire Lab Diamond Ring features a 2ct Super Cut F color, VS2 clarity lab diamond with 0.42ct side diamonds, set in a micro-prong 18k gold band.
18K Solid Gold 2.5ct Solitaire Lab Grown Diamond Ring
18K Solid Gold 2.6ct Lab Grown Diamond Engagement Ring
18K Solid Gold 2.6ct Oval Shape Lab Grown Diamond Engagement Ring
18K Solid Gold 2.6ct Oval Shape Lab Grown Diamond Engagement Ring
18K Solid Gold 2.6ct Solitaire Lab Grown Diamond Engagement Ring
18K Solid Gold 2.6ct Solitaire Lab Grown Diamond Engagment Ring
18K Solid Gold 2.71ct Oval Shape Lab Grown Diamond Engagement Ring
18K Solid Gold 2.7ct Emerald Cut Lab Grown Diamond Engagement Ring
18K Solid Gold 2.7ct Solitaire Lab Grown Diamond Engagement Ring
18K Solid Gold 2.7ct Solitaire Lab Grown Diamond Engagement Ring
18K Solid Gold 2.7ct Solitaire Lab Grown Diamond Engagment Ring
18K Solid Gold 2.8ct Lab Grown Diamond Engagement Ring
18K Solid Gold 3 Ct Emerald Cut Halo Lab Grown Diamond Engagement Ring
18K Solid Gold 3.5ct Pear Cut lab Grown Diamond Engagement Ring
18K Solid Gold 3ct Halo Lab Grown Diamond Ring
A luxurious 3ct halo lab-grown diamond ring in 18k solid gold, featuring a 2ct round-cut diamond and 56 side stones (1.02ct total). Available in white, rose, and yellow gold. BIS & IGI Certified.
18K Solid Gold 3ct Oval Shape Lab Grown Diamond Engagement Ring
18k Solid Gold 3ct Pear Cut lab Grown Diamond Engagement Ring
18K Solid Gold 3ct Round Lab Grown Diamond Ring
18k Solid Gold 3ct Solitaire Lab Grown Diamond Ring
18K Solid Gold 3ct Solitaire Lab Grown Diamond Ring
A 2-carat solitaire lab-grown diamond ring with 94 round diamonds (1.04ct) in solid 18k gold. BIS Hallmarked & IGI Certified for unmatched brilliance.
18K Solid Gold Halo Lab Grown Diamond Engagement Ring
History, Types, Cultural Significance Of Lab-Grown Diamond Engagement Ring
A 3 ct engagement ring makes an undeniable statement—bold, elegant, and unforgettable. It’s the ring for those who believe in celebrating love in the biggest way, with a diamond that truly stands out. And thanks to lab-grown technology, you can enjoy this extraordinary size without sacrificing quality or ethics.
Our collection features:
Solitaires that let the diamond shine
Halo and double-halo rings that add extra sparkle
Three-stone styles with meaningful symbolism
Split-shank and hidden halo settings
Available in round, oval, emerald, cushion, princess, and pear cuts
US shoppers love lab-grown diamonds because they offer real luxury, responsible sourcing, and unmatched value. A 3 ct lab-grown ring isn’t just about size—it’s about love, intention, and a commitment to beauty with integrity.
Quality of Material Used
Every engagement ring is made using solid 14K & 18K gold—not plated or gold-filled. Choose from yellow, white, or rose gold for a finish that suits your style and skin tone.
Our lab-grown diamonds are ethically created, expertly selected, and hand-set by skilled artisans. All rings are hypoallergenic, safe for sensitive skin, and built for everyday elegance.
Certifications Provided
Each 3 carat lab-grown diamond ring includes:
An IGI certificate verifying carat, cut, clarity, and origin
A 14K & 18KÂ gold purity stamp
A detailed invoice and authenticity documentation
This is fine jewelry you can trust—backed by certification, transparency, and craftsmanship.
Craftsmanship
From the first sketch to the final polish, each ring is handcrafted by master jewelers with precision and care. Every diamond is carefully set, every finish is polished to perfection, and every ring is individually inspected before it ships.
Because when you're proposing forever, the ring should reflect nothing less.
Frequently Asked Questions
1. How long does shipping take to the USA?
Shipping takes 12 to 22 days to your doorstep in the USA.
2. Are your diamonds and gold real?
Yes. All rings are made with IGI-certified lab-grown diamonds and 100% solid 14K & 18K gold.
3. How do lab-grown diamonds compare to mined ones?
They’re identical in every way—same look, strength, and brilliance—just more sustainable and affordable.
4. Will my ring come with certification?
Yes. Every ring includes an IGI certificate, a 14K & 18K gold stamp, and full documentation.
5. What is your return policy?
Returns are accepted only for damaged items or if the wrong ring is delivered.
6. Is shipping free in the USA?
Yes, we offer free shipping across all 50 states.
7. Will I receive tracking information?
Absolutely. A tracking number will be emailed once your ring ships.
8. Can I customize my 3 ct ring?
Yes! We accept custom orders—email us with your design or preferred specifications.
9. Are the rings safe for sensitive skin?
Yes, all rings are nickel-free and hypoallergenic, perfect for daily wear.
10. How do I contact The Karat Store?
Reach out to us at contact@thekaratstore.us for questions, custom requests, or order support.