CaratHunter
Plans
Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 3555438928

Certificate GIA 3555438928

Diamond specifications and retailer prices

From £3,972 GBP
As of November 5, 2026
Save £3,627 GBP (48%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £7,599 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural round diamond

This 1.51ct natural round 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 and certified by GIA 3555438928. Listed at 19 retailers as of November 4, 2026, with prices from £3,972 to £7,599, a £3,627 spread on the same certified stone. MOH London lists it at £7,599. 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3555438928
Dimensions7.30 × 7.34 × 4.58 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.30 mm7.34 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555438928
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 62.5%

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 5
Current: £7,599 GBP|Low: £3,919 GBP|High: £7,712 GBP|Avg: £4,980 GBP|-1.5%
MOH London
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 6, 2026
Retailer 12£3,919 GBP
Retailer 3£3,972 GBP
Retailer 6£4,087 GBP
Retailer 19£4,090 GBP
Retailer 4£4,140 GBP
Retailer 7£4,325 GBP
Retailer 20£4,359 GBP
Retailer 11£4,607 GBP
Retailer 5£4,616 GBP
Retailer 18£4,686 GBP
Retailer 9£4,762 GBP
Retailer 17£4,771 GBP
Retailer 13£4,879 GBP
Retailer 10£4,894 GBP
Retailer 2£5,290 GBP
Retailer 8£5,293 GBP
Retailer 14£5,499 GBP
Retailer 15£6,310 GBP
Retailer 16£7,497 GBP
MOH London£7,599 GBP

29 data points across 20 retailers

19 retailers£3,972 GBP to £7,599 GBP

A
Cheapest Retailer
-
£3,972 GBP
A
Retailer 2
-
£4,087 GBP
View
A
Retailer 3
-
£4,090 GBP
View
A
Retailer 4
-
£4,140 GBP
View
B+
Retailer 5
-
£4,325 GBP
View
Final sale: no returns
B+
Retailer 6
-
£4,359 GBP
View
B+
Retailer 7
-
£4,616 GBP
View
B+
Retailer 8
-
£4,686 GBP
View
Retailer 9
-
£4,762 GBP
View
Price last confirmed 22 days ago
B+
Retailer 10
-
£4,771 GBP
View
B+
Retailer 11
-
£4,879 GBP
View
Retailer 12
-
£4,894 GBP
View
Price last confirmed 33 days ago
Retailer 13
-
£4,991 GBP
View
Price last confirmed 29 days ago
B+
Retailer 14
-
£5,290 GBP
View
B+
Retailer 15
-
£5,293 GBP
View
B+
Retailer 16
-
£5,499 GBP
View
B
Retailer 17
-
£6,310 GBP
View
B
Retailer 18
-
£7,497 GBP
View
Most Expensive
B
MOH London
BCCCD8CA4 · Nov 4
£7,599 GBP
View
18 more retailers have this diamond
Prices start from £3,972 GBPSave up to £3,627 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 Round
£3,972 GBP