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Round|Natural|GIA

1.51ct G SI2 Round Natural Diamond

EX • G/SI2 • GIA 6511363422

Certificate GIA 6511363422

Diamond specifications and retailer prices

From $8,137 AUD
$5,716 USD
As of October 30, 2026
Save $9,585 AUD (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $17,722 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6511363422. Listed at 16 retailers as of October 30, 2026, with prices from $8,137 to $17,722, a $9,585 spread on the same certified stone. NZ Jewellers lists it at $17,722. 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
G
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6511363422
Dimensions7.31 × 7.27 × 4.54 mm
L/W Ratio1.01
Top View
7.31 mm7.27 mm1.51 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6511363422
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.5%

Caratlytics Score

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

Price History

Last verified: Oct 30
Current: $17,722 AUD|Low: $7,683 AUD|High: $17,722 AUD|Avg: $10,994 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
November 1, 2026
Retailer 7$8,029 AUD
Retailer 8$8,372 AUD
Retailer 9$8,859 AUD
Retailer 3$8,860 AUD
Retailer 11$9,599 AUD
Retailer 10$9,747 AUD
Retailer 6$9,923 AUD
Retailer 2$10,903 AUD
Retailer 12$11,076 AUD
Retailer 4$11,675 AUD
Retailer 5$14,768 AUD
NZ Jewellers$17,722 AUD

37 data points across 12 retailers

16 retailers$8,137 AUD to $17,722 AUD

Retailer 1
-
$8,029 AUD
$5,640 USD
Price last confirmed 11 days ago
A
Retailer 2
-
$8,137 AUD
$5,716 USD
View
A
Retailer 3
-
$8,372 AUD
$5,881 USD
View
B+
Retailer 4
-
$8,859 AUD
$6,223 USD
View
Final sale: no returns
A
Retailer 5
-
$8,860 AUD
$6,224 USD
View
B+
Retailer 6
-
$9,599 AUD
$6,743 USD
View
B+
Retailer 7
-
$9,747 AUD
$6,847 USD
View
B+
Retailer 8
-
$9,923 AUD
£5,489 GBP
View
B+
Retailer 9
-
$10,478 AUD
$7,360 USD
View
B+
Retailer 10
-
$10,478 AUD
$7,360 USD
View
B+
Retailer 11
-
$10,508 AUD
$7,381 USD
View
B+
Retailer 12
-
$10,834 AUD
$7,610 USD
View
B+
Retailer 13
-
$10,903 AUD
€7,294 EUR
View
B+
Retailer 14
-
$11,076 AUD
$7,780 USD
View
B
Retailer 15
-
$14,768 AUD
£8,168 GBP
View
Most Expensive
B
NZ Jewellers
674544cd-a763-4487-a622-a750ca9529cc · Oct 30
$17,722 AUD
$12,449 USD
View
15 more retailers have this diamond
Prices start from $8,137 AUDSave up to $9,585 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
$8,137 AUD