Radiant|Lab Grown|IGI

0.51ct E IF Radiant Lab Grown Diamond

VG • E/IF • IGI LG789630177

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG789630177

Diamond specifications and retailer prices

From £100 GBP
$134 USD
As of October 30, 2026
Save £942 GBP (90%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,679 GBP at Diamond Quarter · As of October 28, 2026
View at Diamond Quarter

About this 0.51ct lab-grown radiant diamond

This 0.51ct lab-grown radiant sits in the half to three-quarter carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG789630177 or 789630177. Listed at 22 retailers as of October 29, 2026, with a 942% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
E
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.2°
Pavilion angle34.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG789630177
Dimensions5.73 × 3.70 × 2.69 mm
L/W Ratio1.55
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
5.73 mm3.70 mm0.51 ctE / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG789630177
Side View
Table 62.0%Crown 45.2°Girdle: ThickPavilion 34.5°Culet: NoneDepth 72.7%

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: £210 GBP|Low: £94 GBP|High: £1,066 GBP|Avg: £316 GBP|+0.9%
Retailer 1
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
October 30, 2026
Retailer 2£100 GBP
Retailer 18£116 GBP
Retailer 8£122 GBP
Retailer 12£124 GBP
Retailer 5£136 GBP
Retailer 17£175 GBP
Retailer 1£210 GBP
Retailer 9£218 GBP
Retailer 20£224 GBP
Retailer 3£243 GBP
Retailer 19£246 GBP
Retailer 10£250 GBP
Retailer 7£310 GBP
Retailer 4£349 GBP
Retailer 13£373 GBP
Retailer 15£399 GBP
Retailer 11£413 GBP
Retailer 6£441 GBP
Retailer 16£734 GBP
Retailer 14£1,042 GBP

32 data points across 20 retailers

22 retailers£100 GBP to £1,042 GBP

A
Cheapest Retailer
-
£100 GBP
$134 USD
A
Retailer 2
-
£116 GBP
$156 USD
View
A
Retailer 3
-
£122 GBP
$163 USD
View
A
Retailer 4
-
£124 GBP
$166 USD
View
A
Retailer 5
-
£136 GBP
$182 USD
View
Final sale: no returns
A
Retailer 6
-
£175 GBP
$235 USD
View
A
Retailer 7
-
£210 GBP
View
A
Retailer 8
-
£218 GBP
€278 EUR
View
A
Retailer 9
-
£224 GBP
ZAR 4,855 ZAR
View
B+
Retailer 10
-
£243 GBP
$325 USD
View
B+
Retailer 11
-
£246 GBP
$329 USD
View
Retailer 12
-
£250 GBP
$335 USD
View
Price last confirmed 12 days ago
B+
Retailer 13
-
£310 GBP
A$639 AUD
View
B+
Retailer 14
-
£349 GBP
$467 USD
View
B
Retailer 15
-
£373 GBP
$500 USD
View
B
Retailer 16
-
£399 GBP
$535 USD
View
B
Retailer 17
-
£413 GBP
$554 USD
View
B
Retailer 18
-
£425 GBP
$570 USD
View
B
Retailer 19
-
£441 GBP
$591 USD
View
B
Retailer 20
-
£734 GBP
$983 USD
View
B
Retailer 21
-
£1,042 GBP
View
Most Expensive
Diamond Quarter
0.51IFELG09B0A5N · Oct 28
£1,679 GBP
View
Price under review
21 more retailers have this diamond
Prices start from £100 GBPSave up to £942 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 Radiant
£100 GBP