Radiant|Natural|GIA

1.51ct G SI1 Radiant Natural Diamond

EX • G/SI1 • GIA 5566006502

Certificate GIA 5566006502

Diamond specifications and retailer prices

From $6,493 USD
As of November 1, 2026
Save $4,202 USD (39%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $12,834 USD at NZ Jewellers · As of October 21, 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 G 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 5566006502. Listed at 16 retailers as of November 1, 2026, with a 65% 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

1.51
Carat
G
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.91°
OriginNatural
Grading LabGIA
CertificateGIA 5566006502
Dimensions7.85 × 5.79 × 3.86 mm
L/W Ratio1.36
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
7.85 mm5.79 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5566006502
Side View
Table 67.0%Crown 47.91°GirdlePavilionCulet: 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 1
Current: $12,834 USD|Low: $6,493 USD|High: $13,342 USD|Avg: $8,283 USD|-3.8%
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 2, 2026
Retailer 3$6,493 USD
Retailer 6$6,692 USD
Retailer 13$7,080 USD
Retailer 5$7,082 USD
Retailer 9$7,231 USD
Retailer 2$7,235 USD
Retailer 8$7,363 USD
Retailer 16$7,398 USD
Retailer 7$7,673 USD
Retailer 15$7,791 USD
Retailer 14$7,837 USD
Retailer 12$8,385 USD
Retailer 4$8,854 USD
Retailer 11$9,428 USD
Retailer 10$10,695 USD
NZ Jewellers$12,834 USD

25 data points across 16 retailers

16 retailers$6,493 USD to $10,695 USD

A
Cheapest Retailer
-
$6,493 USD
A
Retailer 2
-
$6,692 USD
View
B+
Retailer 3
-
$7,080 USD
View
B+
Retailer 4
-
$7,082 USD
View
Final sale: no returns
B+
Retailer 5
-
$7,231 USD
£5,693 GBP
View
B+
Retailer 6
-
$7,235 USD
£5,697 GBP
View
Retailer 7
-
$7,363 USD
View
Price last confirmed 17 days ago
Retailer 8
-
$7,398 USD
A$11,382 AUD
View
Price last confirmed 11 days ago
Retailer 9
-
$7,673 USD
View
Price last confirmed 10 days ago
Retailer 10
-
$7,791 USD
View
Price last confirmed 10 days ago
B+
Retailer 11
-
$7,837 USD
View
B+
Retailer 12
-
$8,385 USD
€7,986 EUR
View
Retailer 13
-
$8,854 USD
View
Price last confirmed 11 days ago
B+
Retailer 14
-
$9,428 USD
ZAR 152,310 ZAR
View
B
Retailer 15
-
$10,695 USD
£8,421 GBP
View
Most Expensive
NZ Jewellers
6fae2622-e45e-4ac6-8d72-ae0669f0c512 · Oct 21
$12,834 USD
View
Price last confirmed 11 days ago
15 more retailers have this diamond
Prices start from $6,493 USDSave up to $4,202 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
$6,493 USD