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Round|Lab Grown|IGI

1.51ct J SI1 Round Lab Grown Diamond

VG • J/SI1 • IGI LG442067251

Shape and cutting style on the report: Round brilliant

Certificate IGI LG442067251

Diamond specifications and retailer prices

From £634 GBP
$850 USD
As of October 31, 2026
Save £2,617 GBP (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,251 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG442067251 or 442067251. Listed at 11 retailers as of October 31, 2026, with prices from £634 to £3,251, a £2,617 spread on the same certified stone. MOH London lists it at £3,251. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG442067251
Dimensions7.26 × 7.22 × 4.63 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.26 mm7.22 mm1.51 ctJ / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG442067251
Side View
Table 56.5%Crown 36°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 64.0%

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: Oct 31
Current: £3,251 GBP|Low: £634 GBP|High: £3,294 GBP|Avg: £1,465 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2£634 GBP
Retailer 3£872 GBP
Retailer 6£977 GBP
Retailer 4£1,012 GBP
Retailer 10£1,102 GBP
Retailer 7£1,142 GBP
Retailer 9£1,437 GBP
Retailer 5£1,607 GBP
Retailer 8£1,993 GBP
MOH London£3,251 GBP

15 data points across 10 retailers

11 retailers£634 GBP to £3,251 GBP

A
Cheapest Retailer
-
£634 GBP
$850 USD
B+
Retailer 2
-
£872 GBP
$1,169 USD
View
B+
Retailer 3
-
£949 GBP
$1,271 USD
View
B+
Retailer 4
-
£977 GBP
$1,309 USD
View
Final sale: no returns
Retailer 5
-
£1,012 GBP
$1,356 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
£1,012 GBP
$1,356 USD
View
B
Retailer 7
-
£1,142 GBP
$1,530 USD
View
B
Retailer 8
-
£1,607 GBP
$2,153 USD
View
B
Retailer 9
-
£1,896 GBP
$2,541 USD
View
B
Retailer 10
-
£1,993 GBP
$2,671 USD
View
Most Expensive
B
MOH London
LG442067251 · Nov 1
£3,251 GBP
View
10 more retailers have this diamond
Prices start from £634 GBPSave up to £2,617 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
£634 GBP