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Round|Lab Grown|IGI

1.70ct H SI2 Round Lab Grown Diamond

EX • H/SI2 • IGI LG407945444

Shape and cutting style on the report: Round brilliant

Certificate IGI LG407945444

Diamond specifications and retailer prices

From £731 GBP
$980 USD
As of October 30, 2026
Save £2,973 GBP (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,704 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG407945444 or 407945444. Listed at 11 retailers as of October 29, 2026, with prices from £731 to £3,704, a £2,973 spread on the same certified stone. MOH London lists it at £3,704. 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407945444
Dimensions7.67 × 7.63 × 4.79 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
7.67 mm7.63 mm1.70 ctH / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG407945444
Side View
Table 54.0%Crown 34.3°Girdle: MediumPavilion 40.9°Culet: NoneDepth 62.6%

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: £3,704 GBP|Low: £731 GBP|High: £3,734 GBP|Avg: £1,718 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
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 30, 2026
Retailer 2£731 GBP
Retailer 5£833 GBP
Retailer 9£1,112 GBP
Retailer 12£1,210 GBP
Retailer 14£1,246 GBP
Retailer 10£1,290 GBP
Retailer 15£1,290 GBP
Retailer 6£1,420 GBP
Retailer 8£1,578 GBP
Retailer 4£1,753 GBP
Retailer 11£2,033 GBP
Retailer 3£2,341 GBP
Retailer 13£2,418 GBP
Retailer 7£2,888 GBP
MOH London£3,704 GBP

21 data points across 15 retailers

11 retailers£731 GBP to £3,704 GBP

A
Cheapest Retailer
-
£731 GBP
$980 USD
B+
Retailer 2
-
£1,112 GBP
$1,490 USD
View
B+
Retailer 3
-
£1,210 GBP
$1,621 USD
View
B+
Retailer 4
-
£1,246 GBP
$1,669 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,290 GBP
$1,729 USD
View
Retailer 6
-
£1,290 GBP
$1,729 USD
View
Price last confirmed 18 days ago
B+
Retailer 7
-
£1,578 GBP
View
B
Retailer 8
-
£2,033 GBP
$2,724 USD
View
B
Retailer 9
-
£2,341 GBP
$3,137 USD
View
B
Retailer 10
-
£2,418 GBP
$3,240 USD
View
Most Expensive
B
MOH London
LG407945444 · Oct 29
£3,704 GBP
View
10 more retailers have this diamond
Prices start from £731 GBPSave up to £2,973 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
£731 GBP