Radiant|Natural|IGI

1.51ct H SI1 Radiant Natural Diamond

VG • H/SI1 • IGI 828653791

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI 828653791

Diamond specifications and retailer prices

From $4,213 USD
As of November 6, 2026
Save $4,332 USD (51%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $8,545 USD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 828653791. Listed at 16 retailers as of November 5, 2026, with prices from $4,213 to $8,545, a $4,332 spread on the same certified stone. NZ Jewellers lists it at $8,545. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
H
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle51.1°
Pavilion angle28.7°
OriginNatural
Grading LabIGI
CertificateIGI 828653791
Dimensions7.61 × 5.56 × 3.71 mm
L/W Ratio1.37
Culet sizeNone
Top View
7.61 mm5.56 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 828653791
Side View
Table 67.0%Crown 51.1°Girdle: STK-THKPavilion 28.7°Culet: NoneDepth 66.7%

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: $8,545 USD|Low: $4,213 USD|High: $8,717 USD|Avg: $5,379 USD|-2.0%
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
Retailer 15
Retailer 16
November 7, 2026
Retailer 12$4,213 USD
Retailer 2$4,280 USD
Retailer 11$4,459 USD
Retailer 6$4,492 USD
Retailer 13$4,527 USD
Retailer 9$4,831 USD
Retailer 10$4,848 USD
Retailer 7$4,867 USD
Retailer 5$4,904 USD
Retailer 14$4,981 USD
Retailer 8$5,003 USD
Retailer 15$5,136 USD
Retailer 16$5,574 USD
Retailer 3$5,984 USD
Retailer 4$7,790 USD
NZ Jewellers$8,545 USD

15 data points across 16 retailers

16 retailers$4,213 USD to $8,545 USD

A
Cheapest Retailer
-
$4,213 USD
A
Retailer 2
-
$4,280 USD
View
A
Retailer 3
-
$4,459 USD
View
Final sale: no returns
A
Retailer 4
-
$4,492 USD
View
A
Retailer 5
-
$4,527 USD
View
A
Retailer 6
-
$4,831 USD
View
A
Retailer 7
-
$4,848 USD
View
B+
Retailer 8
-
$4,867 USD
View
A
Retailer 9
-
$4,904 USD
View
A
Retailer 10
-
$4,981 USD
View
Retailer 11
-
$5,003 USD
View
Price last confirmed 9 days ago
A
Retailer 12
-
$5,136 USD
View
B+
Retailer 13
-
$5,574 USD
View
B+
Retailer 14
-
$5,984 USD
View
B
Retailer 15
-
$7,790 USD
View
Most Expensive
B
NZ Jewellers
f83d0672-7283-49fd-af05-b905100c3c1f · Nov 5
$8,545 USD
View
15 more retailers have this diamond
Prices start from $4,213 USDSave up to $4,332 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 Radiant
$4,213 USD