Round|Natural|GIA

0.40ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 7508979744

Certificate GIA 7508979744

Diamond specifications and retailer prices

From $534 USD
As of October 29, 2026
Save $241 USD (31%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $1,781 USD at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 0.4ct natural round diamond

This 0.4ct natural round sits in the sub-half-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7508979744. Listed at 23 retailers as of October 29, 2026, with a 45% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.40
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 7508979744
Dimensions4.71 × 4.68 × 2.95 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Crystal, Cloud
Top View
4.71 mm4.68 mm0.40 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7508979744
Side View
Table 57.0%Crown 36.5°Girdle: THN-STKPavilion 41°Culet: NoneDepth 62.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $775 USD|Low: $520 USD|High: $1,327 USD|Avg: $817 USD|+3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 5$520 USD
Retailer 2$554 USD
Retailer 10$635 USD
Retailer 3$666 USD
Retailer 7$715 USD
Retailer 1$775 USD
Retailer 8$854 USD
Retailer 6$879 USD
Retailer 9$1,163 USD
Retailer 4$1,318 USD

39 data points across 10 retailers

23 retailers$534 USD to $775 USD

Retailer 1
-
$514 USD
Price last confirmed 43 days ago
Retailer 2
-
$514 USD
View
Price last confirmed 11 days ago
Retailer 3
-
$520 USD
View
Price last confirmed 13 days ago
B+
Retailer 4
-
$534 USD
View
Retailer 5
-
$535 USD
View
Price last confirmed 10 days ago
Retailer 6
-
$554 USD
View
Price last confirmed 15 days ago
Retailer 7
-
$554 USD
View
Price last confirmed 15 days ago
Retailer 8
-
$594 USD
View
Price last confirmed 12 days ago
Retailer 9
-
$594 USD
View
Price last confirmed 39 days ago
Retailer 10
-
$629 USD
View
Price last confirmed 13 days ago
Retailer 11
-
$660 USD
View
Price last confirmed 11 days ago
Retailer 12
-
$666 USD
£524 GBP
View
Price last confirmed 10 days ago
Retailer 13
-
$680 USD
View
Price last confirmed 12 days ago
Retailer 14
-
$715 USD
View
Price last confirmed 11 days ago
B
Retailer 15
-
$763 USD
View
B
Retailer 16
-
$775 USD
€738 EUR
View
Retailer 17
-
$854 USD
A$1,314 AUD
View
Price last confirmed 27 days ago
Retailer 18
-
$879 USD
ZAR 14,202 ZAR
View
Price last confirmed 14 days ago
Retailer 19
-
$1,163 USD
£916 GBP
View
Price last confirmed 31 days ago
Retailer 20
-
$1,318 USD
£1,038 GBP
View
Price last confirmed 12 days ago
Retailer 21
-
$1,731 USD
CA$2,404 CAD
View
Price under review
Retailer 22
-
$1,781 USD
View
Price under review
Most Expensive
NZ Jewellers
9d40ccd2-22e2-443f-a2c4-34a390b8f945 · Oct 20
$1,781 USD
View
Price under review
22 more retailers have this diamond
Prices start from $534 USDSave up to $241 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
0.40ct Round
$534 USD