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Round|Lab Grown|IGI

0.51ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG707549316

Shape and cutting style on the report: Round brilliant

Certificate IGI LG707549316

Diamond specifications and retailer prices

From £91 GBP
$122 USD
As of October 25, 2026
Save £544 GBP (86%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £635 GBP at Reve Diamonds · As of October 25, 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 LG707549316 or 707549316. Listed at 15 retailers as of October 25, 2026, with prices from £91 to £635, a £544 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG707549316
Dimensions5.16 × 5.19 × 3.11 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
5.16 mm5.19 mm0.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG707549316
Side View
Table 60.0%Crown 32.3°Girdle: MED-STKPavilion 41°Culet: NoneDepth 60.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 25
Current: £173 GBP|Low: £54 GBP|High: £635 GBP|Avg: £220 GBP|+4.7%
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
Reve Diamonds
October 27, 2026
Retailer 3£69 GBP
Retailer 15£78 GBP
Retailer 5£80 GBP
Retailer 12£91 GBP
Retailer 13£91 GBP
Retailer 10£123 GBP
Retailer 8£150 GBP
Retailer 1£173 GBP
Retailer 6£178 GBP
Retailer 7£194 GBP
Retailer 14£199 GBP
Retailer 11£259 GBP
Retailer 4£275 GBP
Retailer 2£320 GBP
Retailer 9£630 GBP
Reve Diamonds£635 GBP

39 data points across 16 retailers

15 retailers£91 GBP to £635 GBP

Retailer 1
-
£69 GBP
$93 USD
Price last confirmed 8 days ago
Retailer 2
-
£80 GBP
$107 USD
View
Price last confirmed 7 days ago
Retailer 3
-
£91 GBP
$122 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
£91 GBP
$122 USD
View
Retailer 5
-
£123 GBP
$165 USD
View
Price last confirmed 9 days ago
A
Retailer 6
-
£150 GBP
View
A
Retailer 7
-
£173 GBP
€221 EUR
View
B+
Retailer 8
-
£178 GBP
$239 USD
View
B+
Retailer 9
-
£194 GBP
$260 USD
View
B+
Retailer 10
-
£199 GBP
$266 USD
View
B+
Retailer 11
-
£259 GBP
$347 USD
View
B+
Retailer 12
-
£275 GBP
$369 USD
View
B
Retailer 13
-
£320 GBP
$428 USD
View
B
Retailer 14
-
£630 GBP
View
Most Expensive
B
Reve Diamonds
32AEC2105 · Oct 25
£635 GBP
$851 USD
View
14 more retailers have this diamond
Prices start from £91 GBPSave up to £544 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
£91 GBP