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Round|Natural|GIA

1.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2235873913

Certificate GIA 2235873913

Diamond specifications and retailer prices

From $6,300 AUD
As of November 1, 2026
Save $6,665 AUD (51%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $13,651 AUD at NZ Jewellers · As of September 26, 2026
View at NZ Jewellers

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2235873913. Listed at 24 retailers as of November 1, 2026, with a 106% 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2235873913
Dimensions7.25 × 7.30 × 4.57 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Key to symbols
Crystal, Cloud, Needle
Top View
7.25 mm7.30 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2235873913
Side View
Table 58.0%Crown 35.5°Girdle: Slightly ThickPavilion 41.2°Culet: NoneDepth 62.8%

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: $8,780 AUD|Low: $6,257 AUD|High: $13,156 AUD|Avg: $8,455 AUD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9$6,300 AUD
Retailer 4$6,450 AUD
Retailer 3$6,824 AUD
Retailer 10$7,394 AUD
Retailer 5$7,832 AUD
Retailer 2$7,957 AUD
Retailer 11$7,957 AUD
Retailer 12$8,214 AUD
Retailer 1$8,780 AUD
Retailer 6$8,917 AUD
Retailer 8$9,205 AUD
Retailer 7$12,965 AUD

37 data points across 12 retailers

24 retailers$6,300 AUD to $12,965 AUD

A
Cheapest Retailer
-
$6,300 AUD
A
Retailer 2
-
$6,450 AUD
View
A
Retailer 3
-
$6,824 AUD
View
Final sale: no returns
A
Retailer 4
-
$7,318 AUD
View
Retailer 5
-
$7,394 AUD
View
Price last confirmed 8 days ago
Retailer 6
-
$7,394 AUD
View
Price last confirmed 29 days ago
Retailer 7
-
$7,394 AUD
View
Price last confirmed 50 days ago
Retailer 8
-
$7,394 AUD
View
Price last confirmed 15 days ago
Retailer 9
-
$7,394 AUD
View
Price last confirmed 29 days ago
Retailer 10
-
$7,394 AUD
View
Price last confirmed 38 days ago
A
Retailer 11
-
$7,832 AUD
View
B+
Retailer 12
-
$7,957 AUD
View
B+
Retailer 13
-
$7,957 AUD
View
B+
Retailer 14
-
$8,214 AUD
View
Retailer 15
-
$8,532 AUD
View
Price last confirmed 45 days ago
Retailer 16
-
$8,532 AUD
View
Price last confirmed 28 days ago
B+
Retailer 17
-
$8,532 AUD
View
B+
Retailer 18
-
$8,780 AUD
View
B+
Retailer 19
-
$8,917 AUD
View
Retailer 20
-
$9,005 AUD
View
Price last confirmed 24 days ago
B+
Retailer 21
-
$9,205 AUD
View
B
Retailer 22
-
$12,965 AUD
View
Retailer 23
-
$13,651 AUD
View
Price last confirmed 48 days ago
Most Expensive
NZ Jewellers
0297ace1-4c25-4e24-8a38-83a7ff6b9e58 · Sep 26
$13,651 AUD
$9,556 USD
View
Price last confirmed 40 days ago
23 more retailers have this diamond
Prices start from $6,300 AUDSave up to $6,665 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
$6,300 AUD