Radiant|Natural|IGI

1.51ct K SI1 Radiant Natural Diamond

VG • K/SI1 • IGI 805628261

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

Certificate IGI 805628261

Diamond specifications and retailer prices

From $2,706 USD
As of November 6, 2026
Save $2,926 USD (52%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $5,632 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 805628261. Listed at 12 retailers as of November 5, 2026, with prices from $2,706 to $5,632, a $2,926 spread on the same certified stone. NZ Jewellers lists it at $5,632. 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
K
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle30.1°
OriginNatural
Grading LabIGI
CertificateIGI 805628261
Dimensions7.88 × 5.52 × 3.83 mm
L/W Ratio1.43
Top View
7.88 mm5.52 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 805628261
Side View
Table 69.0%Crown 37.2°Girdle: STK-THKPavilion 30.1°CuletDepth 69.4%

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 6
Current: $5,632 USD|Low: $2,706 USD|High: $5,632 USD|Avg: $3,719 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 3$2,706 USD
Retailer 2$3,110 USD
Retailer 4$3,136 USD
Retailer 8$3,233 USD
Retailer 10$3,357 USD
Retailer 6$3,730 USD
Retailer 5$3,939 USD
Retailer 7$3,946 USD
Retailer 9$5,392 USD
NZ Jewellers$5,632 USD

40 data points across 10 retailers

12 retailers$2,706 USD to $5,632 USD

A
Cheapest Retailer
-
$2,706 USD
B+
Retailer 2
-
$3,110 USD
View
B+
Retailer 3
-
$3,136 USD
View
B+
Retailer 4
-
$3,225 USD
View
B+
Retailer 5
-
$3,233 USD
View
B+
Retailer 6
-
$3,357 USD
View
B+
Retailer 7
-
$3,376 USD
View
B+
Retailer 8
-
$3,730 USD
View
B+
Retailer 9
-
$3,939 USD
View
B+
Retailer 10
-
$3,946 USD
View
B
Retailer 11
-
$5,392 USD
View
Most Expensive
B
NZ Jewellers
d03f0501-cf4a-4061-9fb1-4c34e4e16201 · Nov 5
$5,632 USD
View
11 more retailers have this diamond
Prices start from $2,706 USDSave up to $2,926 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
$2,706 USD