Round|Natural|GIA

1.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 2418646255

Certificate GIA 2418646255

Diamond specifications and retailer prices

From $15,109 USD
Save $6,687 USD (31%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $26,811 USD at MOH London
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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2418646255. Listed at 17 retailers, with a 44% 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
G
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 2418646255
Dimensions7.42 × 7.38 × 4.52 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.42 mm7.38 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2418646255
Side View
Table 60.0%Crown 31.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 1
Current: $26,811 USD|Low: $15,109 USD|High: $26,811 USD|Avg: $19,416 USD|+1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 1, 2026
Retailer 8$15,109 USD
Retailer 10$16,820 USD
Retailer 9$16,882 USD
Retailer 2$18,053 USD
Retailer 7$18,134 USD
Retailer 11$18,465 USD
Retailer 5$19,619 USD
Retailer 3$21,008 USD
Retailer 6$21,796 USD
Retailer 4$24,686 USD
MOH London$26,811 USD

40 data points across 11 retailers

17 retailers$15,109 USD to $21,796 USD

B
Cheapest Retailer
-
$15,109 USD
B
Retailer 2
-
$16,820 USD
View
B
Retailer 3
-
$16,882 USD
View
Price last confirmed 32 days ago
B
Retailer 4
-
$17,374 USD
View
B
Retailer 5
-
$18,053 USD
A$27,773 AUD
View
B
Retailer 6
-
$18,134 USD
£14,279 GBP
View
B
Retailer 7
-
$18,465 USD
View
B
Retailer 8
-
$18,899 USD
View
B
Retailer 9
-
$19,619 USD
€18,685 EUR
View
B
Retailer 10
-
$19,844 USD
View
B
Retailer 11
-
$20,473 USD
View
B
Retailer 12
-
$21,008 USD
View
B
Retailer 13
-
$21,261 USD
View
B
Retailer 14
-
$21,796 USD
£17,163 GBP
View
B
Retailer 15
-
$24,476 USD
View
Price under review
B
Retailer 16
-
$24,686 USD
ZAR 398,811 ZAR
View
Price under review
Most Expensive
B
MOH London
EB9BC6F5D · Oct 1
$26,811 USD
£21,111 GBP
View
Price under review
16 more retailers have this diamond
Prices start from $15,109 USDSave up to $6,687 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.

B
1.51ct Round
$15,109 USD