Oval|Natural|GIA

1.51ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 2566156295

Certificate GIA 2566156295

Diamond specifications and retailer prices

From $4,224 USD
As of November 5, 2026
Save $3,424 USD (45%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $7,648 USD at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

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 2566156295. Listed at 13 retailers as of November 5, 2026, with prices from $4,224 to $7,648, a $3,424 spread on the same certified stone. Wholesale Diamonds Direct lists it at $7,648. 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
FluorescenceFaint
Crown angle40.24°
Pavilion angle39.43°
OriginNatural
Grading LabGIA
CertificateGIA 2566156295
Dimensions8.95 × 6.42 × 3.96 mm
L/W Ratio1.39
Culet sizeNone
Top View
8.95 mm6.42 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2566156295
Side View
Table 60.0%Crown 40.24°Girdle: MED-THKPavilion 39.43°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $5,404 USD|Low: $4,224 USD|High: $8,557 USD|Avg: $5,407 USD|-8.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Wholesale Diamonds Direct
November 6, 2026
Retailer 10$4,224 USD
Retailer 7$4,344 USD
Retailer 6$4,385 USD
Retailer 8$4,460 USD
Retailer 3$4,535 USD
Retailer 4$4,551 USD
Retailer 2$4,578 USD
Retailer 5$4,698 USD
Retailer 11$5,278 USD
Retailer 12$5,290 USD
Retailer 1$5,404 USD
Retailer 9$7,075 USD
Wholesale Diamonds Direct$7,648 USD

33 data points across 13 retailers

13 retailers$4,224 USD to $7,648 USD

A
Cheapest Retailer
-
$4,224 USD
A
Retailer 2
-
$4,344 USD
View
A
Retailer 3
-
$4,385 USD
View
A
Retailer 4
-
$4,460 USD
View
A
Retailer 5
-
$4,535 USD
View
A
Retailer 6
-
$4,551 USD
View
A
Retailer 7
-
$4,578 USD
View
A
Retailer 8
-
$4,698 USD
View
A
Retailer 9
-
$5,278 USD
View
A
Retailer 10
-
$5,290 USD
View
A
Retailer 11
-
$5,404 USD
View
B+
Retailer 12
-
$7,075 USD
View
Most Expensive
B+
Wholesale Diamonds Direct
579393277 · Nov 6
$7,648 USD
View
12 more retailers have this diamond
Prices start from $4,224 USDSave up to $3,424 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
$4,224 USD