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Oval|Natural|GIA

1.51ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 2557187780

Certificate GIA 2557187780

Diamond specifications and retailer prices

From $4,925 SGD
HK$30,100 HKD
As of November 1, 2026
Save $6,486 SGD (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $11,411 SGD at NZ Jewellers · As of October 30, 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 I 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 2557187780. Listed at 11 retailers as of October 30, 2026, with prices from $4,925 to $11,411, a $6,486 spread on the same certified stone. NZ Jewellers lists it at $11,411. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557187780
Dimensions8.84 × 6.32 × 4.10 mm
L/W Ratio1.40
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
8.84 mm6.32 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557187780
Side View
Table 62.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 64.8%

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: $11,411 SGD|Low: $4,925 SGD|High: $12,183 SGD|Avg: $7,403 SGD|-6.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 4$4,925 SGD
Retailer 6$5,628 SGD
Retailer 8$6,006 SGD
Retailer 9$6,217 SGD
Retailer 11$6,370 SGD
Retailer 3$6,404 SGD
Retailer 7$6,706 SGD
Retailer 10$6,823 SGD
Retailer 2$7,608 SGD
Retailer 5$10,867 SGD
NZ Jewellers$11,411 SGD

42 data points across 11 retailers

11 retailers$4,925 SGD to $11,411 SGD

A
Cheapest Retailer
-
$4,925 SGD
HK$30,100 HKD
A
Retailer 2
-
$5,628 SGD
€4,193 EUR
View
A
Retailer 3
-
$6,006 SGD
$4,698 USD
View
A
Retailer 4
-
$6,217 SGD
$4,863 USD
View
Retailer 5
-
$6,370 SGD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$6,404 SGD
$5,009 USD
View
Final sale: no returns
A
Retailer 7
-
$6,706 SGD
$5,246 USD
View
B+
Retailer 8
-
$6,823 SGD
$5,337 USD
View
B+
Retailer 9
-
$7,608 SGD
€5,668 EUR
View
B
Retailer 10
-
$10,867 SGD
£6,693 GBP
View
Most Expensive
B
NZ Jewellers
5b2d960c-fe95-4daa-a8f4-fc95cf67fffe · Oct 30
$11,411 SGD
$8,926 USD
View
10 more retailers have this diamond
Prices start from $4,925 SGDSave up to $6,486 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
$4,925 SGD