We track list prices for a fixed basket of diamond specifications at the online retailers whose listings can be read automatically, so you can see at a glance what a comparable stone costs at each. The data is re-sampled on the first of each month and every earlier snapshot is kept, so price movement stays visible.
Prices below are the advertised list price in USD at the time of sampling, before any promotional codes. Since October 2026 the sample is taken by a script from Brilliant Earth’s loose-stone product feed (lab-grown and natural) and from Blue Nile’s natural-diamond listing; the stone each price came from is linked in the SKU column so you can check it while it is still for sale. Earlier snapshots were taken by hand across more retailers and remain in each basket’s history. Where a retailer listed no in-stock match for a basket, the row shows no price rather than a substitute.
Read our methodology for how we gather and verify data, and our affiliate disclosure for the commercial relationships behind some of these retailers.
1.00ct Round, G colour, VS1 clarity, Excellent cut (Natural)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant EarthLowest | $2,940 | 150 | $4,620 | 88711020 | Ideal and Super Ideal cuts, 1.00–1.05 ct, read from Brilliant Earth's product feed. |
| Blue Nile | $3,526 | 32 | $4,162 | 29764398 | Excellent and Ideal cuts, 1.00–1.05 ct. Blue Nile shows its first 32 best matches without a price sort, so this is the lowest of those, not necessarily of all stock. |
Historical snapshots (1)
- 2026-05-03: Rare Carat $5,200 · Blue Nile $5,500 · James Allen $5,800 · Brilliant Earth $6,200 · Whiteflash $7,400
1.00ct Round, G colour, VS1 clarity, Excellent cut (Lab-grown)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant Earth | $510 | 98 | $540 | 88722684 | Ideal and Super Ideal cuts, 1.00–1.05 ct, read from Brilliant Earth's product feed. |
Historical snapshots (1)
- 2026-05-03: Rare Carat $880 · Blue Nile $1,100 · Clean Origin $1,150 · James Allen $1,250 · Vrai $1,650 · Brilliant Earth $1,800
2.00ct Oval, F colour, VS1 clarity (Lab-grown)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant Earth | $2,190 | 66 | $3,130 | 88633522 | Ideal and Super Ideal cuts, 2.00–2.05 ct, read from Brilliant Earth's product feed. |
Historical snapshots (1)
- 2026-05-03: Rare Carat $1,850 · Blue Nile $2,200 · Clean Origin $2,300 · James Allen $2,400 · Brilliant Earth $3,400
1.50ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Lab-grown)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant Earth | $980 | 94 | $1,000 | 88723942 | Ideal and Super Ideal cuts, 1.50–1.55 ct, read from Brilliant Earth's product feed. |
1.50ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Natural)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant EarthLowest | $7,230 | 30 | $10,200 | 88051299 | Ideal and Super Ideal cuts, 1.50–1.55 ct, read from Brilliant Earth's product feed. |
| Blue Nile | $8,322 | 32 | $10,760 | 27017787 | Excellent and Ideal cuts, 1.50–1.55 ct. Blue Nile shows its first 32 best matches without a price sort, so this is the lowest of those, not necessarily of all stock. |
2.00ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Lab-grown)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant Earth | $1,330 | 144 | $2,165 | 88743791 | Ideal and Super Ideal cuts, 2.00–2.05 ct, read from Brilliant Earth's product feed. |
2.00ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Natural)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant EarthLowest | $14,030 | 23 | $22,580 | 88494133 | Ideal and Super Ideal cuts, 2.00–2.05 ct, read from Brilliant Earth's product feed. |
| Blue Nile | $18,308 | 32 | $22,763 | 26470186 | Excellent and Ideal cuts, 2.00–2.05 ct. Blue Nile shows its first 32 best matches without a price sort, so this is the lowest of those, not necessarily of all stock. |
2.50ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Lab-grown)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant Earth | $2,300 | 78 | $2,915 | 88610842 | Ideal and Super Ideal cuts, 2.50–2.55 ct, read from Brilliant Earth's product feed. |
2.50ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Natural)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant EarthLowest | $23,220 | 13 | $32,230 | 84102521 | Ideal and Super Ideal cuts, 2.50–2.55 ct, read from Brilliant Earth's product feed. |
| Blue Nile | $27,224 | 20 | $35,742 | 28090916 | Excellent and Ideal cuts, 2.50–2.55 ct, read from Blue Nile's listing (all 20 matches shown). |
3.00ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Lab-grown)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant Earth | $2,820 | 80 | $4,640 | 88743333 | Ideal and Super Ideal cuts, 3.00–3.05 ct, read from Brilliant Earth's product feed. |
3.00ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Natural)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant EarthLowest | $32,530 | 3 | $48,190 | 88081490 | Ideal and Super Ideal cuts, 3.00–3.05 ct, read from Brilliant Earth's product feed. |
| Blue Nile | $54,119 | 8 | $59,477 | 29986041 | Excellent and Ideal cuts, 3.00–3.05 ct, read from Blue Nile's listing (all 8 matches shown). |
4.00ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Lab-grown)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant Earth | $3,650 | 36 | $3,700 | 88743347 | Ideal and Super Ideal cuts, 4.00–4.05 ct, read from Brilliant Earth's product feed. |
4.00ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Natural)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Blue NileLowest | $81,654 | 7 | $103,158 | 27600124 | Excellent and Ideal cuts, 4.00–4.05 ct, read from Blue Nile's listing (all 7 matches shown). |
| Brilliant Earth | $88,850 | 1 | $88,850 | 88363355 | Ideal and Super Ideal cuts, 4.00–4.05 ct, read from Brilliant Earth's product feed. |
5.00ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Lab-grown)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Brilliant Earth | $4,800 | 25 | $4,850 | 88614957 | Ideal and Super Ideal cuts, 5.00–5.05 ct, read from Brilliant Earth's product feed. |
5.00ct Round, G colour, VS1 clarity, Ideal or Excellent cut (Natural)
Sampled 2026-10-14| Retailer | Lowest price (USD) | Listed | Median | SKU | Notes |
|---|
| Blue Nile | — | 0 | — | — | No natural round listed at 5.00–5.05 ct in G/VS1, Excellent or Ideal cut, on the sample date. |
| Brilliant Earth | — | 0 | — | — | No natural round listed at 5.00–5.05 ct in G/VS1, Ideal or Super Ideal cut, on the sample date. |
How this data is collected
- We define a fixed specification basket: a weight window of X.00 to X.05 ct, one colour, one clarity, one shape and one origin, in the top cut grades (Ideal or Super Ideal at Brilliant Earth, Excellent or Ideal at Blue Nile).
- On the first of each month a script reads every stone matching the basket from Brilliant Earth’s product feed and from Blue Nile’s listing page, and records the lowest list price, the number of matching stones and their median.
- The stone behind each price is recorded by its ID and linked, so anyone can check it while it is still for sale.
- Blue Nile’s listing shows at most 32 best-match stones and has no price sort, so where more than 32 match the note says the price is the lowest of those 32 rather than of all stock. Its lab-grown listing cannot be filtered this way, so lab-grown baskets carry only Brilliant Earth.
- If no in-stock match exists, the row is left blank rather than substituting a non-matching stone.
- Prior snapshots are retained on this page and in its structured data, so price movement over time stays visible to readers and to search engines. The May 2026 snapshots, sampled by hand, also cover Rare Carat, Clean Origin, Whiteflash, Vrai and James Allen (whose stones are now sold through Blue Nile).
The Carat Cut earns commissions on some retailer links. Sampling and ranking decisions are independent of those relationships — see our review methodology.
Related diamond price guides
Deep-dive analysis on each spec we track here.
