CaratHunter
Plans
Cushion|Lab Grown|IGI

0.78ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG685588512

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG685588512

Diamond specifications and retailer prices

From £134 GBP
$178 USD
As of October 28, 2026
Save £1,040 GBP (89%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,174 GBP at Do Amore Diamonds · As of October 28, 2026
View at Do Amore Diamonds

About this 0.78ct lab-grown cushion diamond

This 0.78ct lab-grown cushion sits in the just-under-one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG685588512 or 685588512. Listed at 10 retailers as of October 28, 2026, with prices from £134 to £1,174, a £1,040 spread on the same certified stone. Do Amore Diamonds lists it at £1,174. 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

0.78
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle37.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685588512
Dimensions6.18 × 4.91 × 3.32 mm
L/W Ratio1.26
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.18 mm4.91 mm0.78 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685588512
Side View
Table 60.0%Crown 36.6°Girdle: MED-STKPavilion 37.2°Culet: NoneDepth 67.6%

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 28
Current: £1,174 GBP|Low: £95 GBP|High: £1,174 GBP|Avg: £475 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 28, 2026
Retailer 6£134 GBP
Retailer 4£148 GBP
Retailer 7£202 GBP
Retailer 5£226 GBP
Retailer 2£291 GBP
Retailer 3£766 GBP
Retailer 8£801 GBP
Do Amore Diamonds£1,174 GBP

38 data points across 8 retailers

10 retailers£134 GBP to £1,174 GBP

A
Cheapest Retailer
-
£134 GBP
$178 USD
Final sale: no returns
A
Retailer 2
-
£148 GBP
$197 USD
View
A
Retailer 3
-
£202 GBP
$268 USD
View
A
Retailer 4
-
£226 GBP
$300 USD
View
B+
Retailer 5
-
£291 GBP
View
B
Retailer 6
-
£656 GBP
$872 USD
View
B
Retailer 7
-
£766 GBP
View
B
Retailer 8
-
£801 GBP
$1,064 USD
View
B
Retailer 9
-
£1,144 GBP
$1,520 USD
View
Most Expensive
B
Do Amore Diamonds
23-685588512 · Oct 28
£1,174 GBP
$1,560 USD
View
9 more retailers have this diamond
Prices start from £134 GBPSave up to £1,040 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
0.78ct Cushion
£134 GBP