Radiant|Lab Grown|IGI

1.77ct J SI1 Radiant Lab Grown Diamond

EX • J/SI1 • IGI LG619445868

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG619445868

Diamond specifications and retailer prices

From £250 GBP
$335 USD
As of November 1, 2026
Save £702 GBP (74%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £952 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.77ct lab-grown radiant diamond

This 1.77ct lab-grown radiant sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG619445868 or 619445868. Listed at 5 retailers as of October 29, 2026, with prices from £250 to £952, a £702 spread on the same certified stone. MOH London lists it at £952. 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

1.77
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.9°
Pavilion angle34.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG619445868
Dimensions8.80 × 6.03 × 3.93 mm
L/W Ratio1.46
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
8.80 mm6.03 mm1.77 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG619445868
Side View
Table 64.0%Crown 44.9°Girdle: Slightly ThickPavilion 34.8°Culet: NoneDepth 65.2%

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: £952 GBP|Low: £250 GBP|High: £957 GBP|Avg: £545 GBP|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 5£250 GBP
Retailer 3£363 GBP
Retailer 4£410 GBP
Retailer 6£632 GBP
Retailer 2£664 GBP
MOH London£952 GBP

12 data points across 6 retailers

5 retailers£250 GBP to £952 GBP

A
Cheapest Retailer
-
£250 GBP
$335 USD
B+
Retailer 2
-
£363 GBP
$486 USD
View
A
Retailer 3
-
£410 GBP
$549 USD
View
A
Retailer 4
-
£664 GBP
$890 USD
View
Most Expensive
A
MOH London
LG619445868 · Oct 29
£952 GBP
View
4 more retailers have this diamond
Prices start from £250 GBPSave up to £702 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
1.77ct Radiant
£250 GBP