4.00 Ct Cushion Red Ruby and Lab-Grown Diamond Three Stone Ring
Ships in 5 business days
4.00 Ct | Red | Clean Clarity | Cushion Cut | Three Stone | Lab Grown Ruby
Center: 3.50 Ct Cushion Ruby (10x8) | Accent Diamonds: 2 Trapezoid Lab Grown Diamonds = 0.50 Cts | Total: 4.00 Ct | Sizes 4–9
A 3.50 Ct cushion cut ruby in deep red sits center, flanked by two trapezoid lab grown diamonds that sharpen the geometry and let the ruby own the moment. The proportions are deliberate: the trapezoids step down cleanly from the center, adding brilliance without pulling focus.
Lab grown rubies and diamonds are real stones, not simulants, not cubic zirconia. Grown using the same physical and chemical conditions as their mined counterparts, then handset in our New York City studio in the Diamond District. Sold direct from the maker, so more of your investment goes into the ring.
A strong choice for an engagement ring, a milestone anniversary, or any occasion that warrants something built to last.
- Center: 3.50 Ct Cushion Cut Lab Grown Ruby (10x8) | Red | Clean Clarity
- Side Accent Diamonds: 2 Trapezoid Lab Grown Diamonds = 0.50 Cts
- Total Carat Weight: 4.00 Ct
- Lab Grown Ruby and Diamonds: Real stones, chemically identical to mined, not simulants, not cubic zirconia
- Available in: 14K White Gold | 14K Yellow Gold | 14K Rose Gold | 18K White Gold | 18K Yellow Gold | 18K Rose Gold | Platinum
- Ring Sizes: 4–9
- Handcrafted in New York City | Free US Shipping
- Style No. 50080-Ruby
Every Zack & Elle diamond is grown in a controlled environment in months rather than mined over millennia — but chemically, optically, and physically, it is identical to an earth-mined diamond. Each individual diamond of 1.00 carat and above is independently certified by IGI and laser-inscribed for verification.
Complimentary fully insured FedEx shipping within the US, signature required on delivery. Dispatch time is shown above the Add to cart button; FedEx transit is 1–2 business days after that. 30-day returns on unworn pieces; a $75 insured return-label fee is deducted from your refund.
Certification is per individual diamond, not per pair or per piece. Every diamond of 1.00 carat and above arrives with its own IGI grading report, and the report number is laser-inscribed on the stone's girdle — verify it anytime at igi.org. Diamonds under 1.00 carat (for example a 1 ct total-weight pair, which is two 0.50 ct stones, or the stones in tennis bracelets and eternity bands) are graded to the same standards but are not individually certified.
Yes. A lab-grown diamond is chemically, physically, and optically identical to a mined diamond — the same material, simply grown above ground instead of mined. It tests as a diamond on any standard diamond tester.
Because the diamond is grown in weeks rather than mined over millennia, and we sell direct, you get the same beauty, certification, and durability for a fraction of the price of a comparable mined diamond.
Clean gently with warm water, a drop of mild soap, and a soft brush, then pat dry. Store each piece separately to avoid scratching. Reach out any time if you have questions about care.
Questions? Call or text (646) 532-9004 — real humans in our NYC Diamond District studio.
30-Day Returns
NYC Diamond District
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Diamond Details
| Shape | Cushion |
| Total Carat Weight | 4.00 ct |