CaratHunter
Plans
Cushion|Lab Grown|IGI

1.05ct D SI1 Cushion Lab Grown Diamond

VG • D/SI1 • IGI LG596345557

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG596345557

Diamond specifications and retailer prices

From £261 GBP
As of November 1, 2026
Save £478 GBP (65%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £739 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.05ct lab-grown cushion diamond

This 1.05ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG596345557 or 596345557. Listed at 8 retailers as of November 1, 2026, with prices from £261 to £739, a £478 spread on the same certified stone. MOH London lists it at £739. 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

1.05
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG596345557
Dimensions7.05 × 5.30 × 3.66 mm
L/W Ratio1.33
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
7.05 mm5.30 mm1.05 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG596345557
Side View
Table 66.0%Crown 36.5°Girdle: MED-THKPavilion 37.4°Culet: NoneDepth 69.1%

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: Nov 1
Current: £739 GBP|Low: £142 GBP|High: £749 GBP|Avg: £360 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 3, 2026
Retailer 6£142 GBP
Retailer 7£261 GBP
Retailer 2£282 GBP
Retailer 5£283 GBP
Retailer 4£395 GBP
Retailer 3£403 GBP
Retailer 8£444 GBP
MOH London£739 GBP

28 data points across 8 retailers

8 retailers£261 GBP to £739 GBP

A
Cheapest Retailer
-
£261 GBP
Retailer 2
-
£276 GBP
View
Price last confirmed 25 days ago
A
Retailer 3
-
£282 GBP
View
A
Retailer 4
-
£283 GBP
View
B+
Retailer 5
-
£395 GBP
View
B+
Retailer 6
-
£403 GBP
View
B
Retailer 7
-
£549 GBP
View
Most Expensive
B
MOH London
LG596345557 · Nov 1
£739 GBP
View
7 more retailers have this diamond
Prices start from £261 GBPSave up to £478 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
1.05ct Cushion
£261 GBP