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Round|Lab Grown|IGI

1.70ct I SI2 Round Lab Grown Diamond

EX • I/SI2 • IGI LG451055404

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055404

Diamond specifications and retailer prices

From £709 GBP
$950 USD
As of October 30, 2026
Save £2,740 GBP (79%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,449 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.7ct lab-grown round diamond

This 1.7ct 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 LG451055404 or 451055404. Listed at 10 retailers as of October 29, 2026, with prices from £709 to £3,449, a £2,740 spread on the same certified stone. MOH London lists it at £3,449. 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

1.70
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055404
Dimensions7.82 × 7.83 × 4.58 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.82 mm7.83 mm1.70 ctI / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055404
Side View
Table 60.0%Crown 32°GirdlePavilion 40.6°Culet: NoneDepth 58.6%

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: £3,449 GBP|Low: £709 GBP|High: £3,472 GBP|Avg: £1,864 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 2£709 GBP
Retailer 4£1,127 GBP
Retailer 5£1,160 GBP
Retailer 7£1,647 GBP
Retailer 3£1,897 GBP
Retailer 6£2,180 GBP
Retailer 8£2,689 GBP
MOH London£3,449 GBP

10 data points across 8 retailers

10 retailers£709 GBP to £3,449 GBP

A
Cheapest Retailer
-
£709 GBP
$950 USD
B+
Retailer 2
-
£1,036 GBP
$1,388 USD
View
B+
Retailer 3
-
£1,127 GBP
$1,510 USD
View
B+
Retailer 4
-
£1,160 GBP
$1,554 USD
View
Final sale: no returns
Retailer 5
-
£1,202 GBP
$1,610 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
£1,202 GBP
$1,610 USD
View
B
Retailer 7
-
£1,897 GBP
$2,542 USD
View
B
Retailer 8
-
£2,180 GBP
$2,921 USD
View
B
Retailer 9
-
£2,252 GBP
$3,017 USD
View
Most Expensive
B
MOH London
LG451055404 · Oct 29
£3,449 GBP
View
9 more retailers have this diamond
Prices start from £709 GBPSave up to £2,740 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
1.70ct Round
£709 GBP