CaratHunter
Plans
Cushion|Lab Grown|IGI

0.51ct D IF Cushion Lab Grown Diamond

VG • D/IF • IGI LG778616981

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG778616981

Diamond specifications and retailer prices

From £187 GBP
$251 USD
As of November 1, 2026
Save £1,370 GBP (88%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,557 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 0.51ct lab-grown cushion diamond

This 0.51ct lab-grown cushion sits in the half to three-quarter carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG778616981 or 778616981. Listed at 18 retailers as of November 1, 2026, with prices from £187 to £1,557, a £1,370 spread on the same certified stone. Do Amore Diamonds lists it at £1,557. 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

0.51
Carat
D
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778616981
Dimensions4.51 × 4.46 × 3.10 mm
L/W Ratio1.01
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
4.51 mm4.46 mm0.51 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778616981
Side View
Table 62.0%Crown 37.4°Girdle: MED-THKPavilion 39.8°Culet: NoneDepth 69.5%

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: £1,557 GBP|Low: £179 GBP|High: £1,557 GBP|Avg: £597 GBP
Do Amore Diamonds
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
Retailer 16
November 2, 2026
Retailer 15£187 GBP
Retailer 8£210 GBP
Retailer 5£224 GBP
Retailer 7£277 GBP
Retailer 11£320 GBP
Retailer 2£416 GBP
Retailer 3£423 GBP
Retailer 10£435 GBP
Retailer 14£485 GBP
Retailer 12£583 GBP
Retailer 4£655 GBP
Retailer 16£864 GBP
Retailer 6£897 GBP
Retailer 9£919 GBP
Retailer 13£948 GBP
Do Amore Diamonds£1,557 GBP

35 data points across 16 retailers

18 retailers£187 GBP to £1,557 GBP

Retailer 1
-
£183 GBP
$245 USD
Price last confirmed 28 days ago
A
Retailer 2
-
£187 GBP
$251 USD
View
Final sale: no returns
A
Retailer 3
-
£210 GBP
$282 USD
View
Retailer 4
-
£224 GBP
$300 USD
View
Price last confirmed 12 days ago
A
Retailer 5
-
£277 GBP
$372 USD
View
A
Retailer 6
-
£291 GBP
$390 USD
View
A
Retailer 7
-
£320 GBP
$430 USD
View
B+
Retailer 8
-
£416 GBP
ZAR 9,021 ZAR
View
B+
Retailer 9
-
£423 GBP
$567 USD
View
B+
Retailer 10
-
£435 GBP
€556 EUR
View
B+
Retailer 11
-
£485 GBP
A$1,001 AUD
View
B+
Retailer 12
-
£583 GBP
A$1,203 AUD
View
B
Retailer 13
-
£655 GBP
CA$1,221 CAD
View
B
Retailer 14
-
£864 GBP
$1,160 USD
View
Retailer 15
-
£897 GBP
View
Price last confirmed 14 days ago
B
Retailer 16
-
£919 GBP
View
B
Retailer 17
-
£948 GBP
$1,272 USD
View
Most Expensive
B
Do Amore Diamonds
32-LG778616981 · Nov 2
£1,557 GBP
$2,090 USD
View
17 more retailers have this diamond
Prices start from £187 GBPSave up to £1,370 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
0.51ct Cushion
£187 GBP