Radiant|Natural|GIA

1.51ct E SI1 Radiant Natural Diamond

EX • E/SI1 • GIA 7521758243

Certificate GIA 7521758243

Diamond specifications and retailer prices

From £6,069 GBP
$8,082 USD
As of October 29, 2026
Save £2,311 GBP (28%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £8,380 GBP at 77 Diamonds · As of October 30, 2026
View at 77 Diamonds

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7521758243. Listed at 14 retailers as of October 29, 2026, with prices from £6,069 to £8,380, a £2,311 spread on the same certified stone. 77 Diamonds lists it at £8,380. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.82°
Pavilion angle30.53°
OriginNatural
Grading LabGIA
CertificateGIA 7521758243
Dimensions7.47 × 5.67 × 3.84 mm
L/W Ratio1.32
Girdle conditionThick
Key to symbols
Crystal, Cloud, Needle
Top View
7.47 mm5.67 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7521758243
Side View
Table 67.0%Crown 44.82°Girdle: STK-THKPavilion 30.53°Culet: 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: Oct 29
Current: £8,380 GBP|Low: £5,987 GBP|High: £8,423 GBP|Avg: £7,487 GBP|+1.7%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 5£6,069 GBP
Retailer 3£6,883 GBP
Retailer 4£7,605 GBP
Retailer 2£7,964 GBP
Retailer 6£8,301 GBP
77 Diamonds£8,380 GBP

37 data points across 6 retailers

14 retailers£6,069 GBP to £8,380 GBP

B+
Cheapest Retailer
-
£6,069 GBP
$8,082 USD
B+
Retailer 2
-
£6,317 GBP
$8,412 USD
View
B+
Retailer 3
-
£6,398 GBP
A$13,107 AUD
View
B+
Retailer 4
-
£6,542 GBP
$8,712 USD
View
B+
Retailer 5
-
£6,808 GBP
$9,066 USD
View
B+
Retailer 6
-
£6,883 GBP
$9,166 USD
View
Final sale: no returns
B+
Retailer 7
-
£7,605 GBP
$10,128 USD
View
B
Retailer 8
-
£7,964 GBP
$10,605 USD
View
Retailer 9
-
£7,964 GBP
$10,605 USD
View
Price last confirmed 15 days ago
B
Retailer 10
-
£8,050 GBP
$10,720 USD
View
B
Retailer 11
-
£8,050 GBP
$10,720 USD
View
B
Retailer 12
-
£8,301 GBP
$11,054 USD
View
B
Retailer 13
-
£8,320 GBP
$11,080 USD
View
Most Expensive
B
77 Diamonds
RADZHFUHPAGP · Oct 30
£8,380 GBP
View
13 more retailers have this diamond
Prices start from £6,069 GBPSave up to £2,311 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
£6,069 GBP