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Round|Lab Grown|IGI

1.60ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG488131913

Shape and cutting style on the report: Round brilliant

Certificate IGI LG488131913

Diamond specifications and retailer prices

From £731 GBP
$980 USD
As of October 31, 2026
Save £1,049 GBP (59%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,718 GBP at Friendly Diamonds · As of October 30, 2026
View at Friendly Diamonds

About this 1.6ct lab-grown round diamond

This 1.6ct 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 LG488131913 or 488131913. Listed at 12 retailers as of October 31, 2026, with a 143% 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

1.60
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG488131913
Dimensions7.57 × 7.54 × 4.60 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
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
7.57 mm7.54 mm1.60 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG488131913
Side View
Table 57.0%Crown 35.8°Girdle: THN-MEDPavilion 40.2°Culet: NoneDepth 60.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £2,718 GBP|Low: £731 GBP|High: £4,791 GBP|Avg: £2,266 GBP|-2.4%
Friendly Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 3£731 GBP
Retailer 5£1,427 GBP
Retailer 8£1,599 GBP
Retailer 6£1,655 GBP
Retailer 9£1,780 GBP
Retailer 2£2,268 GBP
Retailer 7£2,593 GBP
Friendly Diamonds£2,718 GBP
Retailer 4£4,753 GBP

41 data points across 9 retailers

12 retailers£731 GBP to £1,780 GBP

B+
Cheapest Retailer
-
£731 GBP
$980 USD
B
Retailer 2
-
£1,427 GBP
$1,912 USD
View
B
Retailer 3
-
£1,553 GBP
$2,081 USD
View
B
Retailer 4
-
£1,599 GBP
$2,142 USD
View
Final sale: no returns
B
Retailer 5
-
£1,655 GBP
$2,218 USD
View
Retailer 6
-
£1,655 GBP
$2,218 USD
View
Price last confirmed 21 days ago
B
Retailer 7
-
£1,780 GBP
$2,385 USD
View
Retailer 8
-
£2,268 GBP
View
Price under review
Retailer 9
-
£2,593 GBP
$3,475 USD
View
Price under review
Most Expensive
Friendly Diamonds
1596467 · Oct 30
£2,718 GBP
$3,642 USD
View
Price under review
9 more retailers have this diamond
Prices start from £731 GBPSave up to £1,049 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.

B+
1.60ct Round
£731 GBP