2ct H SI1 Round Natural Diamond Price
The median is $21,382. Half of these diamonds are listed between $18,000 and $25,290 at 29 retailers (measured on October 29, 2026), and the same stone is often priced very differently at each.
2ct H SI1 Round Natural Diamond Price has a median price of $21,382, with the middle half listed between $18,000 and $25,290, across 734 certificated stones from 29 retailers on Carat Hunter (measured on October 29, 2026).
What it actually costs
Middle half listed between $18,000 to $25,290
The same stone, priced differently
Across 484 stones of this specification carried by more than one retailer, the dearest listing sits 52% above the cheapest for the identical diamond, a typical gap of $8,940. This is not a difference in the stone. It is the same certificated diamond, and the gap is what you avoid by comparing before you buy.
What changes the price
Median price for the same specification with one attribute changed, so you can see what flexing each one is worth.
| Change | Median | Difference |
|---|---|---|
| Carat 1.5ct | $9,588 | -55% |
| Carat 3ct | $52,352 | +145% |
| Clarity SI2 | $15,474 | -28% |
| Clarity VS2 | $23,423 | +10% |
| Color I | $17,092 | -20% |
| Color G | $23,828 | +11% |
| Origin lab-grown | $2,347 | -89% |
Reading this specification
At SI1, inclusions are visible under 10x magnification and eye-cleanliness is not guaranteed. In round cuts this is worth checking stone by stone rather than assuming, because two diamonds with the same grade can look quite different.
H is near-colorless and faces up white in most shapes and settings, which is why this part of the scale is the most common value recommendation.
A round brilliant returns more light than any other cut and hides both warmth and small inclusions better than a step cut, so grades that would be marginal elsewhere are usually safe in this shape.
A lab-grown stone of this exact specification runs about 89% below the natural equivalent. If the origin is not important to you, that is the single largest saving available on this page.
Stepping up to 3ct costs about 145% more. Buying just under a round carat weight is the usual way to capture most of the visual size without paying the full jump.
Dropping to 1.5ct saves about 55%, and the difference in visible diameter is small enough that most people cannot pick it without the two stones side by side.
Stones at this specification now
Current examples carried by more than one retailer, so the price comparison is real.
- 2ct H SI1from $12,039 across 27 retailersAs of October 29, 2026
- 2.17ct H SI1from $14,503 across 14 retailersAs of October 29, 2026
- 2.02ct H SI1from $11,710 across 13 retailersAs of October 29, 2026
- 2.02ct H SI1from $12,699 across 15 retailersAs of October 29, 2026
- 2.1ct H SI1from $17,887 across 14 retailersAs of October 29, 2026
- 2.01ct H SI1from $12,460 across 17 retailersAs of October 29, 2026
FAQ
What is a fair price for a 2ct H SI1 Round Natural diamond?
The median is $21,382 and the middle half of stones are listed between $18,000 and $25,290 (measured on October 29, 2026). Those figures cover 734 certificated diamonds listed by 29 retailers, so anything materially above the upper figure is worth questioning.
How much do retailers differ on the same diamond?
Across 484 stones of this specification carried by more than one retailer, the typical gap between the cheapest and dearest listing of the identical diamond is 52%, or about $8,940.
What is the cheapest way to change this specification?
Moving to 1.5ct lowers the median by 55% to $9,588. Moving to SI2 lowers the median by 28% to $15,474. Moving to I lowers the median by 20% to $17,092.
How many retailers carry 2ct H SI1 Round diamonds?
Carat Hunter tracks 29 retailers actively offering diamonds matching this specification, across 838 distinct certified stones.
Is Natural pricing typical for 2ct Round diamonds?
Natural diamond pricing holds its premium over lab-grown at equivalent specifications. The premium varies by shape and clarity grade.
How this is measured
Measured on October 29, 2026 from 838 certificated diamonds between 2 and 2.24 carat, carrying 5280 current listings across 29 retailers. Each stone with a recently confirmed price contributes the cheapest price we last saw for it, so the distribution reflects what a buyer comparing retailers would actually pay. These figures summarize many stones, so they carry the day they were measured rather than the date of any one listing.
Certificated stones with a current listed price only, and every price figure uses only prices we confirmed recently. Uncertificated inventory is excluded because its grades cannot be verified against a laboratory report.
Updated October 29, 2026. Aggregate data across 29 retailers.