Round|Natural|GIA

1.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 6492695970

Certificate GIA 6492695970

Diamond specifications and retailer prices

From $5,235 USD
As of November 4, 2026
Save $6,340 USD (55%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $11,575 USD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6492695970. Listed at 18 retailers as of November 4, 2026, with prices from $5,235 to $11,575, a $6,340 spread on the same certified stone. NZ Jewellers lists it at $11,575. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle32°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6492695970
Dimensions7.45 × 7.42 × 4.48 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
7.45 mm7.42 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6492695970
Side View
Table 58.0%Crown 32°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.4%

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 4
Current: $11,575 USD|Low: $5,024 USD|High: $11,575 USD|Avg: $6,973 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 10$5,235 USD
Retailer 14$5,315 USD
Retailer 12$5,468 USD
Retailer 5$5,788 USD
Retailer 3$6,178 USD
Retailer 6$6,270 USD
Retailer 11$6,270 USD
Retailer 13$6,270 USD
Retailer 2$6,528 USD
Retailer 8$7,088 USD
Retailer 7$7,165 USD
Retailer 4$7,629 USD
Retailer 9$10,168 USD
NZ Jewellers$11,575 USD

43 data points across 14 retailers

18 retailers$5,235 USD to $11,575 USD

A
Cheapest Retailer
-
$5,235 USD
A
Retailer 2
-
$5,315 USD
View
A
Retailer 3
-
$5,468 USD
View
B+
Retailer 4
-
$5,682 USD
View
B+
Retailer 5
-
$5,788 USD
View
Final sale: no returns
B+
Retailer 6
-
$6,178 USD
View
B+
Retailer 7
-
$6,270 USD
View
Retailer 8
-
$6,270 USD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$6,270 USD
View
B+
Retailer 10
-
$6,528 USD
View
B+
Retailer 11
-
$6,880 USD
View
B+
Retailer 12
-
$6,880 USD
View
B+
Retailer 13
-
$7,088 USD
View
B
Retailer 14
-
$7,110 USD
View
B
Retailer 15
-
$7,165 USD
View
Retailer 16
-
$7,629 USD
View
Price last confirmed 14 days ago
B
Retailer 17
-
$10,168 USD
View
Most Expensive
B
NZ Jewellers
a8bcc0aa-6120-4e93-99b0-72c672bdba76 · Nov 5
$11,575 USD
View
17 more retailers have this diamond
Prices start from $5,235 USDSave up to $6,340 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 Round
$5,235 USD