IGI-certified. SEEPZ direct. $900–$1,500 vs $7,000–$12,000 for the natural equivalent.
Price Comparison — Round Brilliant 1.5 Carat
Save 75–92% vs the natural equivalent. Same optical and chemical properties — different origin.
Round brilliants are the most light-efficient cut ever engineered. The 57–58 facets are mathematically optimized for fire and scintillation — which is why rounds cost a slight premium over other shapes. If you're choosing between an Excellent and a Very Good cut, go Excellent: the difference is visible under any light.
At 1.5ct, you're in statement territory — noticeably larger than the 1ct benchmark, commanding attention without the cost spike of jumping to 2ct. The sweet spot for buyers who want undeniable presence without maximalist scale. Lab-grown makes this weight genuinely accessible.
A 1.5ct round measures around 7.4mm — about 14% larger face-up than a 1ct. The difference is clearly visible side-by-side and noticeable on the hand.
Rounds are forgiving on color — G or H faces up white in most settings. If you're setting in yellow gold, H–I is indistinguishable from D–F and saves real money.
VS2 is the sweet spot for rounds. Inclusions are masked by the facet pattern. Eye-clean VS2 beats SI1 with a visible inclusion every time.
Classic prong (4 or 6-prong solitaire) maximizes light entry. Bezel settings protect the stone well for active hands but slightly reduce brilliance at the edges.
Excellent scale on hands size 6–8. On smaller hands, a 1.5ct makes a bold statement. Consider a slender band to maximize the visual impact of the stone.
"Every round diamond we carry goes through the same QC process I applied when grading for export clients at SEEPZ. The cut grade isn't a box to check — it's the difference between a stone that looks alive and one that sits flat. For the 1.5 Carat round, I look specifically at the table percentage and crown angle. We don't carry stones that don't meet that standard."
IGI certified. SEEPZ direct sourcing. Free shipping on all orders.
Our complete framework for buying lab-grown diamonds — cut scores, what retailers don't tell you, and how to avoid the markup traps.