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Radiant|Natural|GIA

1.51ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 1558685000

Certificate GIA 1558685000

Diamond specifications and retailer prices

From £3,078 GBP
$4,124 USD
As of November 1, 2026
Save £2,499 GBP (45%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £5,577 GBP at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded I 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 1558685000. Listed at 13 retailers as of October 26, 2026, with prices from £3,078 to £5,577, a £2,499 spread on the same certified stone. Wholesale Diamonds Direct lists it at £5,577. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1558685000
Dimensions7.75 × 5.70 × 3.87 mm
L/W Ratio1.36
Culet sizeNone
Top View
7.75 mm5.70 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1558685000
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 67.8%

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 1
Current: £3,946 GBP|Low: £3,078 GBP|High: £5,686 GBP|Avg: £3,952 GBP|-1.6%
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
Wholesale Diamonds Direct
November 2, 2026
Retailer 10£3,078 GBP
Retailer 12£3,113 GBP
Retailer 8£3,164 GBP
Retailer 9£3,237 GBP
Retailer 4£3,336 GBP
Retailer 6£3,477 GBP
Retailer 13£3,850 GBP
Retailer 2£3,862 GBP
Retailer 1£3,946 GBP
Retailer 7£4,239 GBP
Retailer 5£4,360 GBP
Retailer 11£5,153 GBP
Retailer 3£5,477 GBP
Wholesale Diamonds Direct£5,577 GBP

31 data points across 14 retailers

13 retailers£3,078 GBP to £5,577 GBP

A
Cheapest Retailer
-
£3,078 GBP
$4,124 USD
A
Retailer 2
-
£3,113 GBP
SGD 5,637 SGD
View
A
Retailer 3
-
£3,164 GBP
$4,240 USD
View
A
Retailer 4
-
£3,237 GBP
$4,337 USD
View
A
Retailer 5
-
£3,336 GBP
SGD 6,040 SGD
View
A
Retailer 6
-
£3,477 GBP
View
A
Retailer 7
-
£3,850 GBP
$5,158 USD
View
A
Retailer 8
-
£3,862 GBP
$5,174 USD
View
A
Retailer 9
-
£3,946 GBP
€5,036 EUR
View
B+
Retailer 10
-
£4,239 GBP
$5,680 USD
View
B
Retailer 11
-
£5,153 GBP
$6,905 USD
View
B
Retailer 12
-
£5,477 GBP
$7,338 USD
View
Most Expensive
B
Wholesale Diamonds Direct
570704296 · Oct 26
£5,577 GBP
$7,473 USD
View
12 more retailers have this diamond
Prices start from £3,078 GBPSave up to £2,499 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
£3,078 GBP