Radiant|Natural|GIA

1.51ct H SI1 Radiant Natural Diamond

EX • H/SI1 • GIA 2564014021

Certificate GIA 2564014021

Diamond specifications and retailer prices

From £5,019 GBP
As of November 4, 2026
Save £3,810 GBP (43%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £9,494 GBP at NZ Jewellers · As of September 28, 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2564014021. Listed at 14 retailers as of November 4, 2026, with a 76% 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2564014021
Dimensions8.03 × 5.67 × 3.84 mm
L/W Ratio1.42
Girdle conditionThick
Top View
8.03 mm5.67 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2564014021
Side View
Table 66.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 67.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £5,940 GBP|Low: £4,117 GBP|High: £8,853 GBP|Avg: £5,845 GBP|+12.2%
Retailer 1
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
November 7, 2026
Retailer 6£4,332 GBP
Retailer 3£5,019 GBP
Retailer 2£5,312 GBP
Retailer 14£5,312 GBP
Retailer 15£5,357 GBP
Retailer 5£5,464 GBP
Retailer 13£5,755 GBP
Retailer 7£5,798 GBP
Retailer 12£5,843 GBP
Retailer 1£5,940 GBP
Retailer 4£6,091 GBP
Retailer 8£6,156 GBP
Retailer 9£6,901 GBP
Retailer 10£7,750 GBP
Retailer 11£8,829 GBP

16 data points across 15 retailers

14 retailers£5,019 GBP to £8,829 GBP

B+
Cheapest Retailer
-
£5,019 GBP
B+
Retailer 2
-
£5,312 GBP
View
B+
Retailer 3
-
£5,312 GBP
View
Final sale: no returns
B+
Retailer 4
-
£5,357 GBP
View
Retailer 5
-
£5,464 GBP
View
Price last confirmed 40 days ago
B+
Retailer 6
-
£5,755 GBP
View
B+
Retailer 7
-
£5,843 GBP
View
B+
Retailer 8
-
£5,940 GBP
View
B
Retailer 9
-
£6,091 GBP
View
B+
Retailer 10
-
£6,156 GBP
View
B
Retailer 11
-
£6,901 GBP
View
B
Retailer 12
-
£7,750 GBP
View
B
Retailer 13
-
£8,829 GBP
View
Most Expensive
NZ Jewellers
93c09131-28a5-4d7a-821b-29a8cc6de063 · Sep 28
£9,494 GBP
$12,708 USD
View
Price last confirmed 39 days ago
13 more retailers have this diamond
Prices start from £5,019 GBPSave up to £3,810 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.

B+
1.51ct Radiant
£5,019 GBP