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Oval|Natural|GIA

1.51ct G SI1 Oval Natural Diamond

EX • G/SI1 • GIA 6555812571

Certificate GIA 6555812571

Diamond specifications and retailer prices

From $7,471 AUD
HK$41,000 HKD
As of November 1, 2026
Save $7,101 AUD (49%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $17,653 AUD at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555812571. Listed at 10 retailers as of October 29, 2026, with a 95% 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Pavilion angle35.77°
OriginNatural
Grading LabGIA
CertificateGIA 6555812571
Dimensions8.80 × 6.29 × 4.04 mm
L/W Ratio1.40
Key to symbols
Crystal, Cloud, Etch Channel, Needle
Top View
8.80 mm6.29 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555812571
Side View
Table 61.0%CrownGirdle: STK-VTKPavilion 35.77°Culet: NoneDepth 64.2%

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: $17,653 AUD|Low: $7,471 AUD|High: $18,426 AUD|Avg: $11,178 AUD|-4.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 4$7,471 AUD
Retailer 8$8,850 AUD
Retailer 5$8,996 AUD
Retailer 3$10,326 AUD
Retailer 7$10,555 AUD
Retailer 9$10,556 AUD
Retailer 2$11,049 AUD
Retailer 6$14,572 AUD
NZ Jewellers$17,653 AUD

39 data points across 9 retailers

10 retailers$7,471 AUD to $14,572 AUD

A
Cheapest Retailer
-
$7,471 AUD
HK$41,000 HKD
Retailer 2
-
$8,850 AUD
SGD 8,401 SGD
View
Price last confirmed 18 days ago
A
Retailer 3
-
$8,996 AUD
$6,319 USD
View
B+
Retailer 4
-
$10,326 AUD
€6,908 EUR
View
Retailer 5
-
$10,555 AUD
$7,414 USD
View
Price last confirmed 13 days ago
B+
Retailer 6
-
$10,556 AUD
View
Retailer 7
-
$10,717 AUD
$7,528 USD
View
Price last confirmed 16 days ago
B+
Retailer 8
-
$11,049 AUD
€7,392 EUR
View
B
Retailer 9
-
$14,572 AUD
£8,060 GBP
View
Most Expensive
NZ Jewellers
8f68d38d-4ac2-40b8-9069-7abb2e366b68 · Oct 20
$17,653 AUD
$12,400 USD
View
Price last confirmed 12 days ago
9 more retailers have this diamond
Prices start from $7,471 AUDSave up to $7,101 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 Oval
$7,471 AUD