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Cushion|Lab Grown|IGI

1.78ct I VS1 Cushion Lab Grown Diamond

EX • I/VS1 • IGI LG12351907

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG12351907

Diamond specifications and retailer prices

From £464 GBP
$622 USD
As of October 30, 2026
Save £1,439 GBP (76%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,903 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.78ct lab-grown cushion diamond

This 1.78ct lab-grown cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG12351907 or 12351907. Listed at 5 retailers as of October 30, 2026, with prices from £464 to £1,903, a £1,439 spread on the same certified stone. Do Amore Diamonds lists it at £1,903. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
I
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12351907
Dimensions7.99 × 6.61 × 4.45 mm
L/W Ratio1.21
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
7.99 mm6.61 mm1.78 ctI / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12351907
Side View
Table 63.0%Crown 37°Girdle: THN-UNDPavilion 39.1°Culet: NoneDepth 67.3%

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: £1,903 GBP|Low: £399 GBP|High: £2,037 GBP|Avg: £1,028 GBP|-6.6%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 28, 2026
Retailer 4£464 GBP
Retailer 2£466 GBP
Retailer 5£486 GBP
Retailer 3£1,262 GBP
Do Amore Diamonds£1,903 GBP

24 data points across 5 retailers

5 retailers£464 GBP to £1,903 GBP

A
Cheapest Retailer
-
£464 GBP
$622 USD
A
Retailer 2
-
£466 GBP
$625 USD
View
A
Retailer 3
-
£486 GBP
$651 USD
View
B
Retailer 4
-
£1,262 GBP
View
Most Expensive
B
Do Amore Diamonds
7-1428655 · Oct 31
£1,903 GBP
$2,550 USD
View
4 more retailers have this diamond
Prices start from £464 GBPSave up to £1,439 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
1.78ct Cushion
£464 GBP