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Oval|Natural|GIA

1.51ct E SI2 Oval Natural Diamond

EX • E/SI2 • GIA 6555675807

Certificate GIA 6555675807

Diamond specifications and retailer prices

From $5,138 AUD
HK$28,200 HKD
As of October 24, 2026
Save $2,688 AUD (34%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $12,321 AUD at NZ Jewellers · As of October 17, 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 E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555675807. Listed at 9 retailers as of October 24, 2026, with a 52% 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
E
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Pavilion angle37.08°
OriginNatural
Grading LabGIA
CertificateGIA 6555675807
Dimensions8.84 × 6.34 × 4.12 mm
L/W Ratio1.39
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
8.84 mm6.34 mm1.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6555675807
Side View
Table 57.0%CrownGirdle: MED-THKPavilion 37.08°Culet: NoneDepth 64.9%

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: Oct 24
Current: $12,321 AUD|Low: $5,138 AUD|High: $12,866 AUD|Avg: $8,155 AUD|-4.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 21, 2026
Retailer 7$5,138 AUD
Retailer 2$6,232 AUD
Retailer 9$6,600 AUD
Retailer 3$6,694 AUD
Retailer 6$7,073 AUD
Retailer 8$7,073 AUD
Retailer 10$7,825 AUD
Retailer 4$8,077 AUD
Retailer 5$11,324 AUD
NZ Jewellers$12,321 AUD

32 data points across 10 retailers

9 retailers$5,138 AUD to $7,825 AUD

A
Cheapest Retailer
-
$5,138 AUD
HK$28,200 HKD
A
Retailer 2
-
$6,232 AUD
$4,378 USD
View
Retailer 3
-
$6,600 AUD
SGD 6,266 SGD
View
Price last confirmed 13 days ago
Retailer 4
-
$6,694 AUD
£3,703 GBP
View
Price last confirmed 11 days ago
Retailer 5
-
$7,073 AUD
$4,969 USD
View
Price last confirmed 12 days ago
Retailer 6
-
$7,073 AUD
$4,969 USD
View
Price last confirmed 13 days ago
A
Retailer 7
-
$7,825 AUD
View
Retailer 8
-
$11,324 AUD
£6,264 GBP
View
Price last confirmed 11 days ago
Most Expensive
NZ Jewellers
0adffb2b-0a48-4c46-8185-57525483dd4f · Oct 17
$12,321 AUD
$8,656 USD
View
Price last confirmed 12 days ago
8 more retailers have this diamond
Prices start from $5,138 AUDSave up to $2,688 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
$5,138 AUD