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Round|Lab Grown|IGI

1.00ct D SI2 Round Lab Grown Diamond

EX • D/SI2 • IGI LG816641818

Shape and cutting style on the report: Round brilliant

Certificate IGI LG816641818

Diamond specifications and retailer prices

From £192 GBP
As of October 30, 2026
Save £779 GBP (80%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £971 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG816641818 or 816641818. Listed at 14 retailers as of October 26, 2026, with prices from £192 to £971, a £779 spread on the same certified stone. MOH London lists it at £971. 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

1.00
Carat
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.1°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816641818
Dimensions6.45 × 6.42 × 3.86 mm
L/W Ratio1.00
Girdle conditionFaceted
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
6.45 mm6.42 mm1.00 ctD / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG816641818
Side View
Table 62.0%Crown 34.1°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 59.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £971 GBP|Low: £61 GBP|High: £981 GBP|Avg: £297 GBP|+0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 9£61 GBP
Retailer 8£124 GBP
Retailer 2£192 GBP
Retailer 3£221 GBP
Retailer 5£223 GBP
Retailer 7£245 GBP
Retailer 6£358 GBP
Retailer 4£394 GBP
MOH London£971 GBP

42 data points across 9 retailers

14 retailers£192 GBP to £971 GBP

Retailer 1
-
£90 GBP
$120 USD
Price last confirmed 22 days ago
Retailer 2
-
£94 GBP
$125 USD
View
Price last confirmed 31 days ago
Retailer 3
-
£109 GBP
$145 USD
View
Price last confirmed 24 days ago
Retailer 4
-
£109 GBP
$145 USD
View
Price last confirmed 42 days ago
Retailer 5
-
£123 GBP
$164 USD
View
Price last confirmed 31 days ago
Retailer 6
-
£124 GBP
$165 USD
View
Price last confirmed 22 days ago
A
Retailer 7
-
£192 GBP
View
B+
Retailer 8
-
£221 GBP
€280 EUR
View
B+
Retailer 9
-
£223 GBP
$297 USD
View
B+
Retailer 10
-
£245 GBP
$326 USD
View
B+
Retailer 11
-
£358 GBP
$477 USD
View
Retailer 12
-
£373 GBP
$497 USD
View
Price last confirmed 29 days ago
B
Retailer 13
-
£394 GBP
$525 USD
View
Most Expensive
B
MOH London
LG816641818 · Oct 26
£971 GBP
View
13 more retailers have this diamond
Prices start from £192 GBPSave up to £779 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
1.00ct Round
£192 GBP