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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

VG • I/SI1 • GIA 6531260924

Certificate GIA 6531260924

Diamond specifications and retailer prices

From $4,738 AUD
HK$26,000 HKD
As of November 1, 2026
Save $6,428 AUD (58%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $11,165 AUD at NZ Jewellers · As of October 30, 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 6531260924. Listed at 19 retailers as of October 30, 2026, with prices from $4,738 to $11,165, a $6,428 spread on the same certified stone. NZ Jewellers lists it at $11,165. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceVery Strong
Crown angle37°
Pavilion angle40°
OriginNatural
Grading LabGIA
CertificateGIA 6531260924
Dimensions7.20 × 7.11 × 4.54 mm
L/W Ratio1.01
Top View
7.20 mm7.11 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceVery Strong
CertificateGIA 6531260924
Side View
Table 58.0%Crown 37°Girdle: STK-THKPavilion 40°Culet: NoneDepth 63.5%

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: $11,165 AUD|Low: $4,683 AUD|High: $11,165 AUD|Avg: $6,946 AUD
NZ Jewellers
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
November 2, 2026
Retailer 9$4,738 AUD
Retailer 11$5,478 AUD
Retailer 13$5,716 AUD
Retailer 15$5,914 AUD
Retailer 14$5,915 AUD
Retailer 2$6,127 AUD
Retailer 4$6,409 AUD
Retailer 5$6,409 AUD
Retailer 3$6,461 AUD
Retailer 7$6,468 AUD
Retailer 12$7,187 AUD
Retailer 8$7,221 AUD
Retailer 6$7,394 AUD
Retailer 10$10,262 AUD
NZ Jewellers$11,165 AUD

43 data points across 15 retailers

19 retailers$4,738 AUD to $11,165 AUD

A
Cheapest Retailer
-
$4,738 AUD
HK$26,000 HKD
B+
Retailer 2
-
$5,478 AUD
$3,848 USD
View
B+
Retailer 3
-
$5,545 AUD
$3,895 USD
View
B+
Retailer 4
-
$5,589 AUD
$3,926 USD
View
B+
Retailer 5
-
$5,716 AUD
$4,015 USD
View
B+
Retailer 6
-
$5,914 AUD
$4,154 USD
View
Final sale: no returns
A
Retailer 7
-
$5,915 AUD
SGD 5,615 SGD
View
Retailer 8
-
$5,964 AUD
SGD 5,661 SGD
View
Price last confirmed 7 days ago
A
Retailer 9
-
$6,127 AUD
£3,389 GBP
View
B+
Retailer 10
-
$6,409 AUD
$4,502 USD
View
B+
Retailer 11
-
$6,409 AUD
$4,502 USD
View
Retailer 12
-
$6,461 AUD
View
Price last confirmed 23 days ago
B+
Retailer 13
-
$6,468 AUD
$4,543 USD
View
B+
Retailer 14
-
$7,187 AUD
£3,975 GBP
View
B+
Retailer 15
-
$7,221 AUD
€4,831 EUR
View
B+
Retailer 16
-
$7,394 AUD
$5,194 USD
View
B
Retailer 17
-
$9,108 AUD
$6,398 USD
View
B
Retailer 18
-
$10,262 AUD
£5,676 GBP
View
Most Expensive
B
NZ Jewellers
1cc335ea-eb93-44d1-91b3-413f7d96281e · Oct 30
$11,165 AUD
$7,843 USD
View
18 more retailers have this diamond
Prices start from $4,738 AUDSave up to $6,428 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
$4,738 AUD