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Round|Lab Grown|IGI

0.99ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG805671868

Shape and cutting style on the report: Round brilliant

Certificate IGI LG805671868

Diamond specifications and retailer prices

From £104 GBP
$140 USD
As of October 26, 2026
Save £503 GBP (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £608 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 0.99ct lab-grown round diamond

This 0.99ct lab-grown round sits in the just-under-one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG805671868 or 805671868. Listed at 16 retailers as of October 26, 2026, with prices from £104 to £608, a £503 spread on the same certified stone. MOH London lists it at £608. 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

0.99
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.5°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG805671868
Dimensions6.36 × 6.30 × 3.85 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.36 mm6.30 mm0.99 ctD / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG805671868
Side View
Table 61.0%Crown 33.5°Girdle: STK-THKPavilion 40°Culet: NoneDepth 60.7%

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 26
Current: £608 GBP|Low: £102 GBP|High: £627 GBP|Avg: £268 GBP|-2.0%
MOH London
Retailer 2
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Retailer 11
Retailer 12
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Retailer 17
October 29, 2026
Retailer 17£104 GBP
Retailer 4£117 GBP
Retailer 3£122 GBP
Retailer 15£130 GBP
Retailer 10£143 GBP
Retailer 13£220 GBP
Retailer 14£221 GBP
Retailer 2£222 GBP
Retailer 6£242 GBP
Retailer 12£250 GBP
Retailer 7£276 GBP
Retailer 8£312 GBP
Retailer 5£328 GBP
Retailer 11£354 GBP
Retailer 9£396 GBP
Retailer 16£417 GBP
MOH London£608 GBP

42 data points across 17 retailers

16 retailers£104 GBP to £608 GBP

A
Cheapest Retailer
-
£104 GBP
$140 USD
A
Retailer 2
-
£122 GBP
$163 USD
View
Retailer 3
-
£130 GBP
$174 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
£143 GBP
HK$1,500 HKD
View
A
Retailer 5
-
£220 GBP
View
A
Retailer 6
-
£221 GBP
$296 USD
View
A
Retailer 7
-
£222 GBP
€283 EUR
View
B+
Retailer 8
-
£242 GBP
$324 USD
View
A
Retailer 9
-
£250 GBP
View
Retailer 10
-
£276 GBP
$370 USD
View
Price last confirmed 12 days ago
B+
Retailer 11
-
£312 GBP
$418 USD
View
B+
Retailer 12
-
£328 GBP
$440 USD
View
B+
Retailer 13
-
£354 GBP
SGD 641 SGD
View
B
Retailer 14
-
£396 GBP
$530 USD
View
B+
Retailer 15
-
£417 GBP
$559 USD
View
Most Expensive
B
MOH London
LG805671868 · Oct 26
£608 GBP
View
15 more retailers have this diamond
Prices start from £104 GBPSave up to £503 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
0.99ct Round
£104 GBP