1.04 ct D VS1 Round Lab-Grown Diamond

Crown 35.2° and pavilion 40.7° are properly complementary. At a 56.0% table a 35.2° crown calls for 40.64° of pavilion and this stone delivers 40.7° — off by 0.06°. Light entering the crown is turned back through the table rather than leaking out of the pavilion. This is the one thing a round brilliant must get right, and it does. It sits on the locus Sasián et al. (2007) identified as the best-performing set, and that Cowing (2005) calls the axis of Excellent.

Strongly fire-biased (lean 100/100). The tall crown disperses light into coloured flashes rather than returning it white. It comes alive under point sources — spotlights, candlelight, direct sun, restaurant lighting — and goes comparatively quiet under overcast sky or office panels. It will photograph worse than it looks in person: a still frame cannot capture dispersion in motion.

From the certificate text: comments state As Grown — no indication of post-growth treatment.

Top tier — score 98.1. The geometry is as strong as certificate numbers can show: crown and pavilion in proper complement, the table where it belongs. This is the standard haus1919 curates to, and this stone clears it with room to spare. What remains — inclusion position and optical symmetry — is confirmed on the actual stone, which no certificate can show.