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1.73ct I SI2 Round Lab Grown Diamond

ID • I/SI2 • IGI LG494174661

Shape and cutting style on the report: Round brilliant

Certificate IGI LG494174661

Diamond specifications and retailer prices

From £939 GBP
$1,250 USD
As of October 29, 2026
Save £2,592 GBP (73%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,531 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.73ct lab-grown round diamond

This 1.73ct lab-grown round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG494174661 or 494174661. Listed at 10 retailers as of October 29, 2026, with prices from £939 to £3,531, a £2,592 spread on the same certified stone. MOH London lists it at £3,531. 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

1.73
Carat
I
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG494174661
Dimensions7.67 × 7.73 × 4.72 mm
L/W Ratio1.01
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
7.67 mm7.73 mm1.73 ctI / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG494174661
Side View
Table 59.0%Crown 33.3°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 61.3%

Caratlytics Score

How it works →
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: Oct 29
Current: £3,531 GBP|Low: £939 GBP|High: £3,559 GBP|Avg: £2,007 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 2£939 GBP
Retailer 4£1,187 GBP
Retailer 6£1,683 GBP
Retailer 3£1,940 GBP
Retailer 5£2,232 GBP
Retailer 7£2,753 GBP
MOH London£3,531 GBP

12 data points across 7 retailers

10 retailers£939 GBP to £3,531 GBP

A
Cheapest Retailer
-
£939 GBP
$1,250 USD
A
Retailer 2
-
£1,060 GBP
$1,412 USD
View
B+
Retailer 3
-
£1,153 GBP
$1,536 USD
View
B+
Retailer 4
-
£1,187 GBP
$1,581 USD
View
Final sale: no returns
Retailer 5
-
£1,230 GBP
$1,638 USD
View
Price last confirmed 17 days ago
B+
Retailer 6
-
£1,230 GBP
$1,638 USD
View
B
Retailer 7
-
£1,940 GBP
$2,584 USD
View
B
Retailer 8
-
£2,232 GBP
$2,972 USD
View
B
Retailer 9
-
£2,305 GBP
$3,069 USD
View
Most Expensive
B
MOH London
LG494174661 · Oct 29
£3,531 GBP
View
9 more retailers have this diamond
Prices start from £939 GBPSave up to £2,592 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
1.73ct Round
£939 GBP