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Round|Lab Grown|IGI

1.51ct H SI1 Round Lab Grown Diamond

EX • H/SI1 • IGI LG12333005

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12333005

Diamond specifications and retailer prices

From £244 GBP
$327 USD
As of November 1, 2026
Save £1,928 GBP (89%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £2,172 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12333005 or 12333005. Listed at 19 retailers as of October 31, 2026, with prices from £244 to £2,172, a £1,928 spread on the same certified stone. Do Amore Diamonds lists it at £2,172. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12333005
Dimensions7.34 × 7.39 × 4.50 mm
L/W Ratio1.01
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment. Type IIa
Top View
7.34 mm7.39 mm1.51 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12333005
Side View
Table 60.5%Crown 35.5°Girdle: MED-UNDPavilion 41°Culet: NoneDepth 61.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £2,172 GBP|Low: £244 GBP|High: £2,172 GBP|Avg: £719 GBP|+0.3%
Do Amore Diamonds
Retailer 2
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Retailer 19
November 1, 2026
Retailer 19£244 GBP
Retailer 16£284 GBP
Retailer 12£299 GBP
Retailer 6£303 GBP
Retailer 15£303 GBP
Retailer 3£349 GBP
Retailer 7£418 GBP
Retailer 8£496 GBP
Retailer 10£521 GBP
Retailer 2£539 GBP
Retailer 17£551 GBP
Retailer 11£602 GBP
Retailer 18£888 GBP
Retailer 9£911 GBP
Retailer 14£933 GBP
Retailer 5£1,075 GBP
Retailer 4£1,192 GBP
Retailer 13£1,313 GBP
Do Amore Diamonds£2,172 GBP

15 data points across 19 retailers

19 retailers£244 GBP to £2,172 GBP

A
Cheapest Retailer
-
£244 GBP
$327 USD
A
Retailer 2
-
£284 GBP
$380 USD
View
B+
Retailer 3
-
£299 GBP
$400 USD
View
A
Retailer 4
-
£303 GBP
$406 USD
View
Retailer 5
-
£303 GBP
$406 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
£349 GBP
$467 USD
View
A
Retailer 7
-
£418 GBP
$560 USD
View
Retailer 8
-
£496 GBP
$665 USD
View
Price last confirmed 11 days ago
A
Retailer 9
-
£521 GBP
$698 USD
View
A
Retailer 10
-
£539 GBP
View
A
Retailer 11
-
£551 GBP
$738 USD
View
A
Retailer 12
-
£602 GBP
$807 USD
View
A
Retailer 13
-
£888 GBP
$1,190 USD
View
A
Retailer 14
-
£911 GBP
$1,220 USD
View
B+
Retailer 15
-
£933 GBP
$1,250 USD
View
B+
Retailer 16
-
£1,075 GBP
$1,440 USD
View
B+
Retailer 17
-
£1,192 GBP
$1,597 USD
View
B+
Retailer 18
-
£1,313 GBP
View
Most Expensive
B
Do Amore Diamonds
27-1DD2B0C89 · Oct 31
£2,172 GBP
$2,910 USD
View
18 more retailers have this diamond
Prices start from £244 GBPSave up to £1,928 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
£244 GBP