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Round|Lab Grown|IGI

1.51ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG494167199

Shape and cutting style on the report: Round brilliant

Certificate IGI LG494167199

Diamond specifications and retailer prices

From £299 GBP
$400 USD
As of November 1, 2026
Save £1,873 GBP (86%) vs most expensive(unlock to see where)
12 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 LG494167199 or 494167199. Listed at 12 retailers as of October 31, 2026, with prices from £299 to £2,172, a £1,873 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG494167199
Dimensions7.35 × 7.38 × 4.55 mm
L/W Ratio1.00
Girdle conditionFaceted
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
7.35 mm7.38 mm1.51 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG494167199
Side View
Table 58.0%Crown 35°Girdle: MediumPavilion 41.1°Culet: NoneDepth 61.8%

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: £2,172 GBP|Low: £299 GBP|High: £2,172 GBP|Avg: £803 GBP|+0.3%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 7£299 GBP
Retailer 9£349 GBP
Retailer 11£418 GBP
Retailer 3£521 GBP
Retailer 6£539 GBP
Retailer 2£590 GBP
Retailer 4£602 GBP
Retailer 8£888 GBP
Retailer 12£911 GBP
Retailer 10£1,192 GBP
Retailer 5£1,306 GBP
Do Amore Diamonds£2,172 GBP

15 data points across 12 retailers

12 retailers£299 GBP to £2,172 GBP

B+
Cheapest Retailer
-
£299 GBP
$400 USD
A
Retailer 2
-
£349 GBP
$467 USD
View
A
Retailer 3
-
£418 GBP
$560 USD
View
A
Retailer 4
-
£521 GBP
$698 USD
View
A
Retailer 5
-
£539 GBP
View
A
Retailer 6
-
£590 GBP
$790 USD
View
A
Retailer 7
-
£602 GBP
$807 USD
View
A
Retailer 8
-
£888 GBP
$1,190 USD
View
A
Retailer 9
-
£911 GBP
$1,220 USD
View
B+
Retailer 10
-
£1,192 GBP
$1,597 USD
View
B+
Retailer 11
-
£1,306 GBP
View
Most Expensive
B
Do Amore Diamonds
27-4CC7EC046 · Oct 31
£2,172 GBP
$2,910 USD
View
11 more retailers have this diamond
Prices start from £299 GBPSave up to £1,873 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
£299 GBP