Oval|Natural|GIA

1.51ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 2557187780

Certificate GIA 2557187780

Diamond specifications and retailer prices

From €3,449 EUR
HK$30,100 HKD
As of November 1, 2026
Save €4,541 EUR (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €7,990 EUR 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 €3,449 to €7,990, a €4,541 spread on the same certified stone. NZ Jewellers lists it at €7,990. 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: €7,990 EUR|Low: €3,449 EUR|High: €8,530 EUR|Avg: €5,178 EUR|-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€3,449 EUR
Retailer 5€3,941 EUR
Retailer 7€4,205 EUR
Retailer 9€4,353 EUR
Retailer 11€4,460 EUR
Retailer 3€4,484 EUR
Retailer 6€4,696 EUR
Retailer 10€4,777 EUR
Retailer 8€5,397 EUR
Retailer 4€7,608 EUR
NZ Jewellers€7,990 EUR

42 data points across 11 retailers

11 retailers€3,449 EUR to €7,990 EUR

A
Cheapest Retailer
-
€3,449 EUR
HK$30,100 HKD
A
Retailer 2
-
€3,941 EUR
View
A
Retailer 3
-
€4,205 EUR
$4,698 USD
View
A
Retailer 4
-
€4,353 EUR
$4,863 USD
View
A
Retailer 5
-
€4,460 EUR
SGD 6,734 SGD
View
A
Retailer 6
-
€4,484 EUR
$5,009 USD
View
Final sale: no returns
A
Retailer 7
-
€4,696 EUR
$5,246 USD
View
B+
Retailer 8
-
€4,777 EUR
$5,337 USD
View
B+
Retailer 9
-
€5,397 EUR
View
B
Retailer 10
-
€7,608 EUR
£6,693 GBP
View
Most Expensive
B
NZ Jewellers
5b2d960c-fe95-4daa-a8f4-fc95cf67fffe · Oct 30
€7,990 EUR
$8,926 USD
View
10 more retailers have this diamond
Prices start from €3,449 EURSave up to €4,541 EUR

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
€3,449 EUR