Round|Lab Grown|IGI

1.62ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG425078889

Shape and cutting style on the report: Round brilliant

Certificate IGI LG425078889

Diamond specifications and retailer prices

From £322 GBP
$432 USD
As of October 30, 2026
Save £1,087 GBP (77%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,343 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.62ct lab-grown round diamond

This 1.62ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG425078889 or 425078889. Listed at 13 retailers as of October 30, 2026, with a 337% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.62
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG425078889
Dimensions7.49 × 7.54 × 4.67 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Chemical Vapor Deposition (CVD) laboratory grown diamond is classified as Type IIa
Top View
7.49 mm7.54 mm1.62 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG425078889
Side View
Table 59.0%Crown 35.5°Girdle: MediumPavilion 41.6°Culet: NoneDepth 62.2%

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 30
Current: £2,343 GBP|Low: £322 GBP|High: £2,343 GBP|Avg: £882 GBP
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
Retailer 13
November 1, 2026
Retailer 10£322 GBP
Retailer 9£328 GBP
Retailer 12£440 GBP
Retailer 3£580 GBP
Retailer 5£641 GBP
Retailer 6£643 GBP
Retailer 7£652 GBP
Retailer 8£687 GBP
Retailer 11£959 GBP
Retailer 13£1,016 GBP
Retailer 4£1,275 GBP
Retailer 2£1,409 GBP
Do Amore Diamonds£2,343 GBP

16 data points across 13 retailers

13 retailers£322 GBP to £1,409 GBP

A
Cheapest Retailer
-
£322 GBP
$432 USD
B+
Retailer 2
-
£328 GBP
$440 USD
View
B+
Retailer 3
-
£440 GBP
$590 USD
View
B+
Retailer 4
-
£580 GBP
$777 USD
View
B
Retailer 5
-
£641 GBP
$859 USD
View
B+
Retailer 6
-
£643 GBP
View
B+
Retailer 7
-
£652 GBP
View
B+
Retailer 8
-
£687 GBP
$920 USD
View
B
Retailer 9
-
£959 GBP
$1,285 USD
View
B
Retailer 10
-
£1,016 GBP
$1,361 USD
View
B
Retailer 11
-
£1,275 GBP
$1,708 USD
View
B
Retailer 12
-
£1,409 GBP
View
Most Expensive
Do Amore Diamonds
27-2A1C5E56F · Oct 31
£2,343 GBP
$3,140 USD
View
Price under review
12 more retailers have this diamond
Prices start from £322 GBPSave up to £1,087 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
1.62ct Round
£322 GBP