CaratHunter
Plans
Round|Lab Grown|IGI

0.51ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG746546698

Shape and cutting style on the report: Round brilliant

Certificate IGI LG746546698

Diamond specifications and retailer prices

From £69 GBP
$93 USD
As of October 29, 2026
Save £566 GBP (89%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £635 GBP at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG746546698 or 746546698. Listed at 16 retailers as of October 29, 2026, with prices from £69 to £635, a £566 spread on the same certified stone. Reve Diamonds lists it at £635. 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

0.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG746546698
Dimensions5.13 × 5.16 × 3.13 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
5.13 mm5.16 mm0.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG746546698
Side View
Table 58.0%Crown 33.9°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.7%

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 29
Current: £260 GBP|Low: £66 GBP|High: £635 GBP|Avg: £201 GBP|-5.2%
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
Reve Diamonds
October 30, 2026
Retailer 6£69 GBP
Retailer 8£75 GBP
Retailer 4£78 GBP
Retailer 2£91 GBP
Retailer 14£91 GBP
Retailer 12£123 GBP
Retailer 9£161 GBP
Retailer 7£172 GBP
Retailer 11£179 GBP
Retailer 3£199 GBP
Retailer 13£259 GBP
Retailer 1£260 GBP
Retailer 5£320 GBP
Retailer 10£633 GBP
Reve Diamonds£635 GBP

43 data points across 15 retailers

16 retailers£69 GBP to £635 GBP

A
Cheapest Retailer
-
£69 GBP
$93 USD
A
Retailer 2
-
£75 GBP
$101 USD
View
A
Retailer 3
-
£78 GBP
$104 USD
View
Final sale: no returns
A
Retailer 4
-
£91 GBP
$122 USD
View
A
Retailer 5
-
£91 GBP
$122 USD
View
Retailer 6
-
£123 GBP
$165 USD
View
Price last confirmed 9 days ago
A
Retailer 7
-
£161 GBP
View
A
Retailer 8
-
£172 GBP
$231 USD
View
B+
Retailer 9
-
£179 GBP
€228 EUR
View
B+
Retailer 10
-
£199 GBP
$266 USD
View
B+
Retailer 11
-
£259 GBP
$347 USD
View
B+
Retailer 12
-
£260 GBP
$348 USD
View
Retailer 13
-
£275 GBP
$368 USD
View
Price last confirmed 29 days ago
B
Retailer 14
-
£320 GBP
$428 USD
View
B
Retailer 15
-
£633 GBP
View
Most Expensive
B
Reve Diamonds
698EC12D3 · Oct 30
£635 GBP
$851 USD
View
15 more retailers have this diamond
Prices start from £69 GBPSave up to £566 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 Round
£69 GBP