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Round|Natural|GIA

1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 7491376602

Certificate GIA 7491376602

Diamond specifications and retailer prices

From $6,613 AUD
As of November 4, 2026
Save $7,387 AUD (53%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $13,999 AUD at NZ Jewellers · As of November 5, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7491376602. Listed at 13 retailers as of November 4, 2026, with prices from $6,613 to $13,999, a $7,387 spread on the same certified stone. NZ Jewellers lists it at $13,999. 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
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 7491376602
Dimensions7.45 × 7.43 × 4.50 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Cert comments
Additional clouds, additional twinning wisps, pinpoints and surface graining are not shown.
Top View
7.45 mm7.43 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7491376602
Side View
Table 60.0%Crown 32.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $13,999 AUD|Low: $6,685 AUD|High: $13,999 AUD|Avg: $9,194 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5$6,685 AUD
Retailer 6$7,582 AUD
Retailer 7$7,582 AUD
Retailer 9$7,582 AUD
Retailer 3$8,031 AUD
Retailer 8$8,750 AUD
Retailer 2$9,085 AUD
Retailer 4$12,298 AUD
NZ Jewellers$13,999 AUD

41 data points across 9 retailers

13 retailers$6,613 AUD to $13,999 AUD

B+
Cheapest Retailer
-
$6,613 AUD
B+
Retailer 2
-
$6,685 AUD
View
B+
Retailer 3
-
$7,058 AUD
View
B
Retailer 4
-
$7,501 AUD
View
B
Retailer 5
-
$7,582 AUD
View
Retailer 6
-
$7,582 AUD
View
Price last confirmed 8 days ago
B
Retailer 7
-
$7,582 AUD
View
B+
Retailer 8
-
$8,031 AUD
View
B
Retailer 9
-
$8,750 AUD
View
B
Retailer 10
-
$9,085 AUD
View
Retailer 11
-
$9,232 AUD
View
Price last confirmed 14 days ago
B
Retailer 12
-
$12,298 AUD
View
Most Expensive
C
NZ Jewellers
2c03ce52-d5a5-4a88-aa87-0d9ab6985084 · Nov 5
$13,999 AUD
$9,800 USD
View
12 more retailers have this diamond
Prices start from $6,613 AUDSave up to $7,387 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.

B+
1.51ct Round
$6,613 AUD