Radiant|Natural|GIA

1.51ct G SI1 Radiant Natural Diamond

EX • G/SI1 • GIA 5566006502

Certificate GIA 5566006502

Diamond specifications and retailer prices

From £4,839 GBP
$6,493 USD
As of November 1, 2026
Save £3,131 GBP (39%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £9,564 GBP 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £9,564 GBP|Low: £4,839 GBP|High: £9,942 GBP|Avg: £6,170 GBP|-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£4,839 GBP
Retailer 6£4,987 GBP
Retailer 13£5,276 GBP
Retailer 5£5,277 GBP
Retailer 2£5,388 GBP
Retailer 10£5,391 GBP
Retailer 8£5,487 GBP
Retailer 16£5,513 GBP
Retailer 7£5,718 GBP
Retailer 15£5,806 GBP
Retailer 14£5,840 GBP
Retailer 9£6,247 GBP
Retailer 4£6,598 GBP
Retailer 12£7,026 GBP
Retailer 11£7,970 GBP
NZ Jewellers£9,564 GBP

25 data points across 16 retailers

16 retailers£4,839 GBP to £7,970 GBP

A
Cheapest Retailer
-
£4,839 GBP
$6,493 USD
A
Retailer 2
-
£4,987 GBP
$6,692 USD
View
B+
Retailer 3
-
£5,276 GBP
$7,080 USD
View
B+
Retailer 4
-
£5,277 GBP
$7,082 USD
View
Final sale: no returns
B+
Retailer 5
-
£5,388 GBP
View
B+
Retailer 6
-
£5,391 GBP
View
Retailer 7
-
£5,487 GBP
$7,363 USD
View
Price last confirmed 17 days ago
Retailer 8
-
£5,513 GBP
A$11,382 AUD
View
Price last confirmed 11 days ago
Retailer 9
-
£5,718 GBP
$7,673 USD
View
Price last confirmed 11 days ago
Retailer 10
-
£5,806 GBP
$7,791 USD
View
Price last confirmed 10 days ago
B+
Retailer 11
-
£5,840 GBP
$7,837 USD
View
B+
Retailer 12
-
£6,247 GBP
€7,984 EUR
View
Retailer 13
-
£6,598 GBP
$8,854 USD
View
Price last confirmed 12 days ago
B+
Retailer 14
-
£7,026 GBP
ZAR 152,310 ZAR
View
B
Retailer 15
-
£7,970 GBP
View
Most Expensive
NZ Jewellers
6fae2622-e45e-4ac6-8d72-ae0669f0c512 · Oct 21
£9,564 GBP
$12,834 USD
View
Price last confirmed 12 days ago
15 more retailers have this diamond
Prices start from £4,839 GBPSave up to £3,131 GBP

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
£4,839 GBP