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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 $6,709 SGD
HK$41,000 HKD
As of November 1, 2026
Save $6,377 SGD (49%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $15,852 SGD 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: $15,852 SGD|Low: $6,709 SGD|High: $16,546 SGD|Avg: $10,038 SGD|-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$6,709 SGD
Retailer 8$7,947 SGD
Retailer 5$8,078 SGD
Retailer 3$9,273 SGD
Retailer 7$9,478 SGD
Retailer 9$9,480 SGD
Retailer 2$9,922 SGD
Retailer 6$13,086 SGD
NZ Jewellers$15,852 SGD

39 data points across 9 retailers

10 retailers$6,709 SGD to $13,086 SGD

A
Cheapest Retailer
-
$6,709 SGD
HK$41,000 HKD
Retailer 2
-
$7,947 SGD
View
Price last confirmed 18 days ago
A
Retailer 3
-
$8,078 SGD
$6,319 USD
View
B+
Retailer 4
-
$9,273 SGD
€6,908 EUR
View
Retailer 5
-
$9,478 SGD
$7,414 USD
View
Price last confirmed 13 days ago
B+
Retailer 6
-
$9,480 SGD
A$11,408 AUD
View
Retailer 7
-
$9,624 SGD
$7,528 USD
View
Price last confirmed 16 days ago
B+
Retailer 8
-
$9,922 SGD
€7,392 EUR
View
B
Retailer 9
-
$13,086 SGD
£8,060 GBP
View
Most Expensive
NZ Jewellers
8f68d38d-4ac2-40b8-9069-7abb2e366b68 · Oct 20
$15,852 SGD
$12,400 USD
View
Price last confirmed 12 days ago
9 more retailers have this diamond
Prices start from $6,709 SGDSave up to $6,377 SGD

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
$6,709 SGD