Round|Natural|GIA

1.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2235864871

Certificate GIA 2235864871

Diamond specifications and retailer prices

From $5,648 USD
As of November 4, 2026
Save $6,308 USD (53%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $11,956 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 2235864871. Listed at 17 retailers as of November 4, 2026, with prices from $5,648 to $11,956, a $6,308 spread on the same certified stone. NZ Jewellers lists it at $11,956. 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
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2235864871
Dimensions7.30 × 7.26 × 4.58 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.30 mm7.26 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2235864871
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $11,956 USD|Low: $5,479 USD|High: $11,956 USD|Avg: $7,827 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
November 6, 2026
Retailer 9$5,977 USD
Retailer 3$6,476 USD
Retailer 10$6,476 USD
Retailer 11$6,476 USD
Retailer 5$6,743 USD
Retailer 2$6,933 USD
Retailer 6$7,347 USD
Retailer 12$7,473 USD
Retailer 4$8,522 USD
Retailer 7$9,936 USD
Retailer 8$10,364 USD
NZ Jewellers$11,956 USD

40 data points across 12 retailers

17 retailers$5,648 USD to $11,956 USD

B+
Cheapest Retailer
-
$5,648 USD
B+
Retailer 2
-
$5,866 USD
View
B+
Retailer 3
-
$5,977 USD
View
Final sale: no returns
B+
Retailer 4
-
$6,476 USD
View
Retailer 5
-
$6,476 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$6,476 USD
View
B+
Retailer 7
-
$6,596 USD
View
B+
Retailer 8
-
$6,743 USD
View
B+
Retailer 9
-
$6,933 USD
View
B
Retailer 10
-
$7,200 USD
View
B
Retailer 11
-
$7,200 USD
View
B
Retailer 12
-
$7,347 USD
View
B
Retailer 13
-
$7,440 USD
View
B
Retailer 14
-
$7,473 USD
View
B
Retailer 15
-
$9,936 USD
View
B
Retailer 16
-
$10,364 USD
View
Most Expensive
B
NZ Jewellers
6cca4859-36cc-4e7e-8995-258bec1d02d7 · Nov 5
$11,956 USD
View
16 more retailers have this diamond
Prices start from $5,648 USDSave up to $6,308 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.

B+
1.51ct Round
$5,648 USD