Radiant|Natural|GIA

1.50ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 6551029978

Certificate GIA 6551029978

Diamond specifications and retailer prices

From $2,944 USD
As of November 6, 2026
Save $3,489 USD (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $6,854 USD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.5ct natural radiant diamond

This 1.5ct natural radiant sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551029978. Listed at 21 retailers as of November 6, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.50
Carat
J
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551029978
Dimensions7.43 × 5.72 × 3.99 mm
L/W Ratio1.30
Top View
7.43 mm5.72 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551029978
Side View
Table 67.0%CrownGirdle: ThickPavilionCulet: NoneDepth 69.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,854 USD|Low: $2,944 USD|High: $6,854 USD|Avg: $4,300 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
Retailer 15
Retailer 16
November 7, 2026
Retailer 5$2,944 USD
Retailer 11$3,114 USD
Retailer 6$3,570 USD
Retailer 16$3,580 USD
Retailer 12$3,701 USD
Retailer 13$3,717 USD
Retailer 9$3,720 USD
Retailer 10$3,917 USD
Retailer 8$3,934 USD
Retailer 3$4,014 USD
Retailer 4$4,050 USD
Retailer 14$4,503 USD
Retailer 7$4,539 USD
Retailer 15$4,721 USD
Retailer 2$6,433 USD
NZ Jewellers$6,854 USD

22 data points across 16 retailers

21 retailers$2,944 USD to $6,433 USD

A
Cheapest Retailer
-
$2,944 USD
A
Retailer 2
-
$3,114 USD
View
A
Retailer 3
-
$3,570 USD
View
Final sale: no returns
A
Retailer 4
-
$3,580 USD
View
A
Retailer 5
-
$3,701 USD
View
A
Retailer 6
-
$3,717 USD
View
A
Retailer 7
-
$3,720 USD
View
B+
Retailer 8
-
$3,735 USD
View
B+
Retailer 9
-
$3,917 USD
View
Retailer 10
-
$3,934 USD
View
Price last confirmed 20 days ago
B+
Retailer 11
-
$3,950 USD
View
B+
Retailer 12
-
$4,014 USD
View
Retailer 13
-
$4,040 USD
View
Price last confirmed 22 days ago
Retailer 14
-
$4,040 USD
View
Price last confirmed 22 days ago
B+
Retailer 15
-
$4,050 USD
View
Retailer 16
-
$4,359 USD
View
Price last confirmed 34 days ago
B+
Retailer 17
-
$4,503 USD
View
Retailer 18
-
$4,539 USD
View
Price last confirmed 19 days ago
B+
Retailer 19
-
$4,721 USD
View
B
Retailer 20
-
$6,433 USD
View
Most Expensive
NZ Jewellers
ac931774-ade8-4784-b7b9-72a207a8cfc0 · Oct 17
$6,854 USD
View
Price last confirmed 20 days ago
20 more retailers have this diamond
Prices start from $2,944 USDSave up to $3,489 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
1.50ct Radiant
$2,944 USD