Round|Natural|GIA

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6532867812

Certificate GIA 6532867812

Diamond specifications and retailer prices

From $2,833 USD
As of November 6, 2026
Save $1,290 USD (31%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $6,351 USD at MOH London · As of October 15, 2026
View at MOH London

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6532867812. Listed at 5 retailers as of November 5, 2026, with a 46% 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

1.51
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6532867812
Dimensions7.27 × 7.30 × 4.60 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
7.27 mm7.30 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6532867812
Side View
Table 55.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,351 USD|Low: $2,833 USD|High: $6,360 USD|Avg: $3,887 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2$2,833 USD
Retailer 5$3,364 USD
Retailer 4$3,873 USD
Retailer 3$4,123 USD
MOH London$6,351 USD

42 data points across 5 retailers

5 retailers$2,833 USD to $4,123 USD

A
Cheapest Retailer
-
$2,833 USD
A
Retailer 2
-
$3,364 USD
View
Retailer 3
-
$3,873 USD
View
Price last confirmed 22 days ago
B+
Retailer 4
-
$4,123 USD
View
Most Expensive
MOH London
F7D090E78 · Oct 15
$6,351 USD
£5,001 GBP
View
Price last confirmed 22 days ago
4 more retailers have this diamond
Prices start from $2,833 USDSave up to $1,290 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.

A
1.51ct Round
$2,833 USD