Top 50 Diamonds by Quality

Our quality score measures pure gemological quality. Cut, polish, symmetry, and proportions. These are the best-made stones in the market right now.

How to Read the Quality Leaderboard

The quality score is a 0-100 index that weights the things that make a diamond actually look good: cut grade first, then polish and symmetry, then proportions (table %, depth %, length-to-width ratio). It deliberately ignores color and clarity, because those grades affect paper value more than appearance, and we want this list to surface diamonds that will look exceptional in person.

Use this list when you care more about sparkle and fire than paper grades. A 1.2ct H/SI1 at 98 quality will out-perform a 1.2ct D/FL at 85 quality in every real-world lighting condition. The light return, the brilliance, the way the facets are aligned. If your priority is 'the stone that looks the most alive when she glances down at her hand,' start here.

These rankings refresh every 24 hours as new stones are added and old ones sell out. A stone in the top 10 today may be gone tomorrow. Click any entry to see full specs, multiple retailer prices (where the same certificate number is listed across our network), and side-by-side comparisons.

#DiamondOriginScoreLowest Price (JPY)
10.71ct OVAL D FLlab grown100¥80,299 JPY
22.16ct MARQUISE D FLlab grown100¥1,326,866 JPY
31.02ct OVAL D FLnatural100¥1,358,209 JPY
41.21ct OVAL D FLnatural100¥1,561,194 JPY
51.31ct EMERALD D FLnatural100¥1,654,687 JPY
61.33ct ROUND D FLnatural100¥1,757,313 JPY
73.02ct PRINCESS D FLlab grown100¥2,370,149 JPY
83.11ct PRINCESS D FLlab grown100¥2,440,299 JPY
93.20ct PRINCESS D FLlab grown100¥2,511,940 JPY
103.35ct PRINCESS D FLlab grown100¥2,628,358 JPY
113.22ct MARQUISE D FLlab grown100¥2,632,836 JPY
123.02ct ROUND D FLlab grown100¥2,780,597 JPY
131.55ct ROUND D FLnatural100¥2,800,621 JPY
141.37ct ROUND D FLnatural100¥2,965,672 JPY
153.37ct OVAL D FLlab grown100¥3,150,746 JPY
163.45ct OVAL D FLlab grown100¥3,225,373 JPY
173.49ct OVAL D FLlab grown100¥3,262,687 JPY
181.71ct OVAL D FLnatural100¥3,413,433 JPY
193.85ct PRINCESS D FLlab grown100¥3,505,970 JPY
204.04ct CUSHION D FLlab grown100¥4,031,343 JPY
214.09ct PRINCESS D FLlab grown100¥4,223,881 JPY
224.35ct ROUND D FLlab grown100¥4,746,269 JPY
234.66ct HEART D FLlab grown100¥4,767,164 JPY
244.43ct ROUND D FLlab grown100¥4,832,836 JPY
252.15ct ROUND D FLnatural100¥8,932,836 JPY
262.11ct ROUND D FLnatural100¥10,248,358 JPY
273.09ct PRINCESS D FLnatural100¥12,305,746 JPY
285.11ct ROUND D FLnatural100¥58,797,612 JPY
295.18ct ROUND D FLnatural100¥60,210,298 JPY
305.18ct ROUND D FLnatural100¥63,249,552 JPY
319.09ct ROUND D FLnatural100¥117,408,821 JPY
320.74ct OVAL D IFlab grown99¥147,761 JPY
331.07ct OVAL D IFlab grown99¥258,955 JPY
341.29ct PRINCESS D IFlab grown99¥438,060 JPY
351.66ct PRINCESS D IFlab grown99¥535,343 JPY
362.01ct EMERALD D IFlab grown99¥864,179 JPY
370.33ct ROUND D IFnatural99¥121,452 JPY
380.51ct ROUND D IFnatural99¥328,855 JPY
392.21ct ROUND D IFlab grown99¥556,866 JPY
402.57ct ROUND D IFlab grown99¥1,092,537 JPY
412.65ct ROUND D IFlab grown99¥1,119,403 JPY
423.08ct CUSHION D IFlab grown99¥1,928,358 JPY
432.01ct PEAR D IFnatural99¥4,579,936 JPY
442.01ct OVAL D IFnatural99¥4,614,633 JPY
450.32ct ROUND D FLlab grown99¥29,104 JPY
460.33ct ROUND D FLlab grown99¥29,851 JPY
470.34ct ROUND D FLlab grown99¥30,448 JPY
480.48ct ROUND D FLlab grown99¥37,910 JPY
490.50ct ROUND D FLlab grown99¥38,806 JPY
500.50ct ROUND D FLlab grown99¥38,806 JPY
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