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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 $3,853 USD
HK$30,100 HKD
As of November 1, 2026
Save $5,073 USD (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $8,926 USD 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 $3,853 to $8,926, a $5,073 spread on the same certified stone. NZ Jewellers lists it at $8,926. 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
Color
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: $8,926 USD|Low: $3,853 USD|High: $9,530 USD|Avg: $5,796 USD|-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 1, 2026
Retailer 2$3,853 USD
Retailer 5$4,402 USD
Retailer 7$4,698 USD
Retailer 9$4,863 USD
Retailer 11$4,983 USD
Retailer 3$5,009 USD
Retailer 6$5,246 USD
Retailer 10$5,337 USD
Retailer 8$6,029 USD
Retailer 4$8,500 USD
NZ Jewellers$8,926 USD

41 data points across 11 retailers

11 retailers$3,853 USD to $8,926 USD

A
Cheapest Retailer
-
$3,853 USD
HK$30,100 HKD
A
Retailer 2
-
$4,402 USD
€4,193 EUR
View
A
Retailer 3
-
$4,698 USD
View
A
Retailer 4
-
$4,863 USD
View
A
Retailer 5
-
$4,983 USD
SGD 6,734 SGD
View
A
Retailer 6
-
$5,009 USD
View
Final sale: no returns
A
Retailer 7
-
$5,246 USD
View
B+
Retailer 8
-
$5,337 USD
View
B+
Retailer 9
-
$6,029 USD
€5,742 EUR
View
B
Retailer 10
-
$8,500 USD
£6,693 GBP
View
Most Expensive
B
NZ Jewellers
5b2d960c-fe95-4daa-a8f4-fc95cf67fffe · Oct 30
$8,926 USD
View
10 more retailers have this diamond
Prices start from $3,853 USDSave up to $5,073 USD

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
$3,853 USD