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Radiant|Lab Grown|IGI

1.74ct H SI1 Radiant Lab Grown Diamond

ID • H/SI1 • IGI LG487108318

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

Certificate IGI LG487108318

Diamond specifications and retailer prices

From £821 GBP
$1,100 USD
As of October 31, 2026
Save £3,296 GBP (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £4,116 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.74ct lab-grown radiant diamond

This 1.74ct lab-grown radiant 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 LG487108318 or 487108318. Listed at 10 retailers as of October 29, 2026, with prices from £821 to £4,116, a £3,296 spread on the same certified stone. MOH London lists it at £4,116. 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

1.74
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.2°
Pavilion angle31.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG487108318
Dimensions7.98 × 6.03 × 4.07 mm
L/W Ratio1.32
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
7.98 mm6.03 mm1.74 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG487108318
Side View
Table 65.5%Crown 45.2°Girdle: MED-STKPavilion 31.9°Culet: NoneDepth 67.5%

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 31
Current: £4,116 GBP|Low: £821 GBP|High: £4,144 GBP|Avg: £2,012 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 2£821 GBP
Retailer 5£1,236 GBP
Retailer 9£1,345 GBP
Retailer 6£1,434 GBP
Retailer 10£1,560 GBP
Retailer 3£1,564 GBP
Retailer 11£1,925 GBP
Retailer 7£2,253 GBP
Retailer 4£2,472 GBP
Retailer 8£2,688 GBP
MOH London£4,116 GBP

16 data points across 11 retailers

10 retailers£821 GBP to £4,116 GBP

A
Cheapest Retailer
-
£821 GBP
$1,100 USD
B+
Retailer 2
-
£1,236 GBP
$1,656 USD
View
B+
Retailer 3
-
£1,345 GBP
$1,802 USD
View
Retailer 4
-
£1,434 GBP
$1,921 USD
View
Price last confirmed 19 days ago
B+
Retailer 5
-
£1,434 GBP
$1,921 USD
View
B+
Retailer 6
-
£1,560 GBP
$2,090 USD
View
B
Retailer 7
-
£2,253 GBP
$3,019 USD
View
B
Retailer 8
-
£2,472 GBP
$3,312 USD
View
B
Retailer 9
-
£2,688 GBP
$3,601 USD
View
Most Expensive
B
MOH London
LG487108318 · Oct 29
£4,116 GBP
View
9 more retailers have this diamond
Prices start from £821 GBPSave up to £3,296 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
1.74ct Radiant
£821 GBP