Oval|Natural|GIA

1.51ct K SI1 Oval Natural Diamond

EX • K/SI1 • GIA 6243025660

Certificate GIA 6243025660

Diamond specifications and retailer prices

From $2,227 USD
As of November 6, 2026
Save $4,076 USD (65%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,303 USD at NZ Jewellers · As of November 5, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6243025660. Listed at 10 retailers as of November 5, 2026, with prices from $2,227 to $6,303, a $4,076 spread on the same certified stone. NZ Jewellers lists it at $6,303. 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
K
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Pavilion angle36.65°
OriginNatural
Grading LabGIA
CertificateGIA 6243025660
Dimensions8.89 × 6.32 × 4.09 mm
L/W Ratio1.41
Key to symbols
Twinning Wisp
Top View
8.89 mm6.32 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 6243025660
Side View
Table 57.0%CrownGirdle: ThickPavilion 36.65°Culet: NoneDepth 64.7%

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 6
Current: $6,303 USD|Low: $2,201 USD|High: $6,303 USD|Avg: $3,685 USD|+10.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8$2,227 USD
Retailer 7$2,774 USD
Retailer 6$3,015 USD
Retailer 2$3,092 USD
Retailer 5$3,131 USD
Retailer 10$3,268 USD
Retailer 3$3,568 USD
Retailer 9$4,756 USD
Retailer 4$5,029 USD
NZ Jewellers$6,303 USD

29 data points across 10 retailers

10 retailers$2,227 USD to $6,303 USD

A
Cheapest Retailer
-
$2,227 USD
A
Retailer 2
-
$2,774 USD
View
A
Retailer 3
-
$3,015 USD
View
A
Retailer 4
-
$3,092 USD
View
A
Retailer 5
-
$3,131 USD
View
B+
Retailer 6
-
$3,268 USD
View
A
Retailer 7
-
$3,568 USD
View
Retailer 8
-
$4,756 USD
View
Price last confirmed 16 days ago
B+
Retailer 9
-
$5,029 USD
View
Most Expensive
B
NZ Jewellers
2ba1d73a-51df-473e-9ff1-0f977d2207be · Nov 5
$6,303 USD
View
9 more retailers have this diamond
Prices start from $2,227 USDSave up to $4,076 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
$2,227 USD