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Cushion|Lab Grown|IGI

1.70ct G SI1 Cushion Lab Grown Diamond

GD • G/SI1 • IGI LG478103526

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG478103526

Diamond specifications and retailer prices

From £292 GBP
$391 USD
As of November 1, 2026
Save £972 GBP (77%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,263 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.7ct lab-grown cushion diamond

This 1.7ct lab-grown cushion sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG478103526 or 478103526. Listed at 12 retailers as of November 1, 2026, with prices from £292 to £1,263, a £972 spread on the same certified stone. MOH London lists it at £1,263. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.70
Carat
G
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG478103526
Dimensions7.13 × 6.69 × 4.59 mm
L/W Ratio1.07
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
7.13 mm6.69 mm1.70 ctG / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478103526
Side View
Table 59.5%Crown 36.5°Girdle: STK-THKPavilion 39.3°Culet: NoneDepth 68.6%

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: Nov 1
Current: £1,263 GBP|Low: £292 GBP|High: £1,280 GBP|Avg: £597 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 6£292 GBP
Retailer 9£323 GBP
Retailer 8£353 GBP
Retailer 2£414 GBP
Retailer 4£474 GBP
Retailer 10£519 GBP
Retailer 5£520 GBP
Retailer 3£577 GBP
Retailer 7£1,247 GBP
MOH London£1,263 GBP

43 data points across 10 retailers

12 retailers£292 GBP to £1,263 GBP

A
Cheapest Retailer
-
£292 GBP
$391 USD
Final sale: no returns
Retailer 2
-
£323 GBP
$433 USD
View
Price last confirmed 7 days ago
B+
Retailer 3
-
£353 GBP
HK$3,700 HKD
View
B+
Retailer 4
-
£414 GBP
View
B+
Retailer 5
-
£474 GBP
$635 USD
View
B+
Retailer 6
-
£474 GBP
$635 USD
View
B+
Retailer 7
-
£519 GBP
$696 USD
View
B+
Retailer 8
-
£520 GBP
$697 USD
View
B+
Retailer 9
-
£577 GBP
View
B
Retailer 10
-
£1,071 GBP
$1,435 USD
View
C
Retailer 11
-
£1,247 GBP
$1,671 USD
View
Most Expensive
B
MOH London
LG478103526 · Nov 1
£1,263 GBP
View
11 more retailers have this diamond
Prices start from £292 GBPSave up to £972 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 Cushion
£292 GBP