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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 $7,738 AUD
As of November 5, 2026
Save $7,065 AUD (48%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $14,803 AUD at MOH London · As of November 4, 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 19 retailers as of November 4, 2026, with prices from $7,738 to $14,803, a $7,065 spread on the same certified stone. MOH London lists it at $14,803. 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
Colour
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 5
Current: $14,803 AUD|Low: $7,634 AUD|High: $15,023 AUD|Avg: $9,702 AUD|-1.5%
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
Retailer 20
November 6, 2026
Retailer 12$7,634 AUD
Retailer 3$7,738 AUD
Retailer 6$7,961 AUD
Retailer 19$7,967 AUD
Retailer 4$8,066 AUD
Retailer 7$8,425 AUD
Retailer 20$8,492 AUD
Retailer 11$8,975 AUD
Retailer 5$8,993 AUD
Retailer 18$9,128 AUD
Retailer 9$9,277 AUD
Retailer 17$9,294 AUD
Retailer 13$9,504 AUD
Retailer 10$9,534 AUD
Retailer 2$10,306 AUD
Retailer 8$10,310 AUD
Retailer 14$10,713 AUD
Retailer 15$12,292 AUD
Retailer 16$14,605 AUD
MOH London$14,803 AUD

29 data points across 20 retailers

19 retailers$7,738 AUD to $14,803 AUD

A
Cheapest Retailer
-
$7,738 AUD
A
Retailer 2
-
$7,961 AUD
View
A
Retailer 3
-
$7,967 AUD
View
A
Retailer 4
-
$8,066 AUD
View
B+
Retailer 5
-
$8,425 AUD
View
Final sale: no returns
B+
Retailer 6
-
$8,492 AUD
View
B+
Retailer 7
-
$8,993 AUD
View
B+
Retailer 8
-
$9,128 AUD
View
Retailer 9
-
$9,277 AUD
View
Price last confirmed 22 days ago
B+
Retailer 10
-
$9,294 AUD
View
B+
Retailer 11
-
$9,504 AUD
View
Retailer 12
-
$9,534 AUD
View
Price last confirmed 33 days ago
Retailer 13
-
$9,724 AUD
View
Price last confirmed 29 days ago
B+
Retailer 14
-
$10,306 AUD
View
B+
Retailer 15
-
$10,310 AUD
View
B+
Retailer 16
-
$10,713 AUD
View
B
Retailer 17
-
$12,292 AUD
View
B
Retailer 18
-
$14,605 AUD
View
Most Expensive
B
MOH London
BCCCD8CA4 · Nov 4
$14,803 AUD
£8,009 GBP
View
18 more retailers have this diamond
Prices start from $7,738 AUDSave up to $7,065 AUD

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
$7,738 AUD