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Radiant|Natural|GIA

1.51ct H SI2 Radiant Natural Diamond

EX • H/SI2 • GIA 1555665977

Certificate GIA 1555665977

Diamond specifications and retailer prices

From £3,465 GBP
$4,643 USD
As of November 1, 2026
Save £3,385 GBP (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £6,850 GBP at NZ Jewellers · As of October 30, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555665977. Listed at 15 retailers as of October 30, 2026, with prices from £3,465 to £6,850, a £3,385 spread on the same certified stone. NZ Jewellers lists it at £6,850. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.22°
OriginNatural
Grading LabGIA
CertificateGIA 1555665977
Dimensions7.78 × 5.83 × 3.99 mm
L/W Ratio1.33
Culet sizeNone
Key to symbols
Crystal, Cloud
Top View
7.78 mm5.83 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555665977
Side View
Table 68.0%Crown 43.22°Girdle: Slightly ThickPavilionCulet: NoneDepth 68.4%

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: £6,850 GBP|Low: £3,357 GBP|High: £7,294 GBP|Avg: £4,620 GBP|-6.1%
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
November 2, 2026
Retailer 4£3,465 GBP
Retailer 14£3,572 GBP
Retailer 3£3,780 GBP
Retailer 2£3,968 GBP
Retailer 8£3,996 GBP
Retailer 5£4,095 GBP
Retailer 6£4,095 GBP
Retailer 12£4,095 GBP
Retailer 13£4,210 GBP
Retailer 11£4,285 GBP
Retailer 7£4,634 GBP
Retailer 10£4,726 GBP
Retailer 9£6,523 GBP
NZ Jewellers£6,850 GBP

26 data points across 14 retailers

15 retailers£3,465 GBP to £6,850 GBP

A
Cheapest Retailer
-
£3,465 GBP
$4,643 USD
A
Retailer 2
-
£3,572 GBP
$4,786 USD
View
A
Retailer 3
-
£3,780 GBP
$5,065 USD
View
Final sale: no returns
A
Retailer 4
-
£3,968 GBP
View
A
Retailer 5
-
£3,996 GBP
View
A
Retailer 6
-
£4,095 GBP
$5,487 USD
View
A
Retailer 7
-
£4,095 GBP
$5,487 USD
View
A
Retailer 8
-
£4,095 GBP
$5,487 USD
View
A
Retailer 9
-
£4,210 GBP
$5,641 USD
View
B+
Retailer 10
-
£4,285 GBP
$5,741 USD
View
B+
Retailer 11
-
£4,634 GBP
€5,913 EUR
View
B+
Retailer 12
-
£4,726 GBP
$6,332 USD
View
Retailer 13
-
£4,777 GBP
$6,400 USD
View
Price last confirmed 12 days ago
B
Retailer 14
-
£6,523 GBP
View
Most Expensive
B
NZ Jewellers
4550dc16-0292-4ea4-b8e9-ba98c68b4e06 · Oct 30
£6,850 GBP
$9,178 USD
View
14 more retailers have this diamond
Prices start from £3,465 GBPSave up to £3,385 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
£3,465 GBP