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Oval|Natural|GIA

1.51ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 2566156295

Certificate GIA 2566156295

Diamond specifications and retailer prices

From $6,148 AUD
As of November 5, 2026
Save $4,983 AUD (45%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $11,131 AUD 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 $6,148 to $11,131, a $4,983 spread on the same certified stone. Wholesale Diamonds Direct lists it at $11,131. 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
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $7,865 AUD|Low: $6,148 AUD|High: $12,455 AUD|Avg: $7,869 AUD|-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$6,148 AUD
Retailer 7$6,322 AUD
Retailer 6$6,382 AUD
Retailer 8$6,491 AUD
Retailer 3$6,600 AUD
Retailer 4$6,624 AUD
Retailer 2$6,663 AUD
Retailer 5$6,837 AUD
Retailer 11$7,682 AUD
Retailer 12$7,699 AUD
Retailer 1$7,865 AUD
Retailer 9$10,297 AUD
Wholesale Diamonds Direct$11,131 AUD

33 data points across 13 retailers

13 retailers$6,148 AUD to $11,131 AUD

A
Cheapest Retailer
-
$6,148 AUD
A
Retailer 2
-
$6,322 AUD
View
A
Retailer 3
-
$6,382 AUD
View
A
Retailer 4
-
$6,491 AUD
View
A
Retailer 5
-
$6,600 AUD
View
A
Retailer 6
-
$6,624 AUD
View
A
Retailer 7
-
$6,663 AUD
View
A
Retailer 8
-
$6,837 AUD
View
A
Retailer 9
-
$7,682 AUD
View
A
Retailer 10
-
$7,699 AUD
View
A
Retailer 11
-
$7,865 AUD
View
B+
Retailer 12
-
$10,297 AUD
View
Most Expensive
B+
Wholesale Diamonds Direct
579393277 · Nov 6
$11,131 AUD
$7,648 USD
View
12 more retailers have this diamond
Prices start from $6,148 AUDSave up to $4,983 AUD

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
$6,148 AUD