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Round|Natural|GIA

1.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 6421142723

Certificate GIA 6421142723

Diamond specifications and retailer prices

From $9,255 USD
As of November 4, 2026
Save $8,213 USD (47%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $17,468 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 6421142723. Listed at 18 retailers as of November 4, 2026, with prices from $9,255 to $17,468, a $8,213 spread on the same certified stone. NZ Jewellers lists it at $17,468. 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
OriginNatural
Grading LabGIA
CertificateGIA 6421142723
Dimensions7.45 × 7.43 × 4.49 mm
L/W Ratio1.00
Top View
7.45 mm7.43 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6421142723
Side View
Table 59.0%CrownGirdle: MediumPavilionCulet: NoneDepth 60.4%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: $17,468 USD|Low: $8,734 USD|High: $17,468 USD|Avg: $12,715 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 7$9,255 USD
Retailer 8$10,481 USD
Retailer 10$10,481 USD
Retailer 2$11,134 USD
Retailer 12$11,354 USD
Retailer 9$11,529 USD
Retailer 5$12,559 USD
Retailer 11$13,101 USD
Retailer 3$13,788 USD
Retailer 4$14,941 USD
Retailer 6$16,324 USD
NZ Jewellers$17,468 USD

41 data points across 12 retailers

18 retailers$9,255 USD to $17,468 USD

B+
Cheapest Retailer
-
$9,255 USD
B
Retailer 2
-
$9,544 USD
View
B
Retailer 3
-
$9,724 USD
View
B
Retailer 4
-
$10,016 USD
View
Retailer 5
-
$10,481 USD
View
Price last confirmed 8 days ago
B
Retailer 6
-
$10,481 USD
View
Final sale: no returns
B
Retailer 7
-
$11,134 USD
View
B
Retailer 8
-
$11,354 USD
View
B
Retailer 9
-
$11,529 USD
View
B
Retailer 10
-
$12,108 USD
View
B
Retailer 11
-
$12,250 USD
View
B
Retailer 12
-
$12,250 USD
View
B
Retailer 13
-
$12,559 USD
View
B
Retailer 14
-
$12,660 USD
View
B
Retailer 15
-
$13,101 USD
View
Retailer 16
-
$13,788 USD
View
Price last confirmed 14 days ago
B
Retailer 17
-
$16,324 USD
View
Most Expensive
B
NZ Jewellers
647ee53a-c6df-43c7-89e3-127918a6fd9a · Nov 5
$17,468 USD
View
17 more retailers have this diamond
Prices start from $9,255 USDSave up to $8,213 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
$9,255 USD