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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 3555438928

Certificate GIA 3555438928

Diamond specifications and retailer prices

From $5,317 USD
As of November 1, 2026
Save $4,882 USD (48%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $10,199 USD at MOH London · As of November 2, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3555438928. Listed at 18 retailers as of November 1, 2026, with prices from $5,317 to $10,199, a $4,882 spread on the same certified stone. MOH London lists it at $10,199. 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
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3555438928
Dimensions7.30 × 7.34 × 4.58 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.30 mm7.34 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555438928
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 62.5%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $10,199 USD|Low: $5,246 USD|High: $10,323 USD|Avg: $6,657 USD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 3, 2026
Retailer 11$5,246 USD
Retailer 19$5,317 USD
Retailer 5$5,470 USD
Retailer 17$5,474 USD
Retailer 3$5,542 USD
Retailer 6$5,789 USD
Retailer 18$5,835 USD
Retailer 10$6,167 USD
Retailer 4$6,180 USD
Retailer 13$6,272 USD
Retailer 8$6,374 USD
Retailer 12$6,386 USD
Retailer 2$6,540 USD
Retailer 9$6,552 USD
Retailer 7$7,084 USD
Retailer 14$7,120 USD
Retailer 15$7,368 USD
Retailer 16$8,506 USD
MOH London$10,199 USD

26 data points across 19 retailers

18 retailers$5,317 USD to $10,199 USD

A
Cheapest Retailer
-
$5,317 USD
A
Retailer 2
-
$5,470 USD
View
A
Retailer 3
-
$5,474 USD
View
A
Retailer 4
-
$5,542 USD
View
B+
Retailer 5
-
$5,789 USD
View
Final sale: no returns
B+
Retailer 6
-
$5,835 USD
View
B+
Retailer 7
-
$6,180 USD
View
B+
Retailer 8
-
$6,272 USD
View
Retailer 9
-
$6,374 USD
View
Price last confirmed 18 days ago
B+
Retailer 10
-
$6,386 USD
View
B+
Retailer 11
-
$6,540 USD
£5,150 GBP
View
Retailer 12
-
$6,552 USD
A$10,080 AUD
View
Price last confirmed 29 days ago
Retailer 13
-
$6,681 USD
View
Price last confirmed 26 days ago
B+
Retailer 14
-
$7,084 USD
View
B+
Retailer 15
-
$7,120 USD
£5,606 GBP
View
B+
Retailer 16
-
$7,368 USD
€7,017 EUR
View
B
Retailer 17
-
$8,506 USD
ZAR 137,409 ZAR
View
Most Expensive
B
MOH London
BCCCD8CA4 · Nov 2
$10,199 USD
£8,031 GBP
View
17 more retailers have this diamond
Prices start from $5,317 USDSave up to $4,882 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
$5,317 USD