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Round|Lab Grown|IGI

0.99ct D VS1 Round Lab Grown Diamond

ID • D/VS1 • IGI LG818644400

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818644400

Diamond specifications and retailer prices

From £110 GBP
$146 USD
As of October 29, 2026
Save £1,044 GBP (90%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,154 GBP at Queensmith · As of October 27, 2026
View at Queensmith

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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG818644400 or 818644400. Listed at 22 retailers as of October 27, 2026, with prices from £110 to £1,154, a £1,044 spread on the same certified stone. Queensmith lists it at £1,154. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.99
Carat
D
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818644400
Dimensions6.49 × 6.44 × 3.87 mm
L/W Ratio1.01
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
6.49 mm6.44 mm0.99 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818644400
Side View
Table 57.0%Crown 34°Girdle: MediumPavilion 40.3°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 29
Current: £234 GBP|Low: £105 GBP|High: £644 GBP|Avg: £277 GBP|+6.2%
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
October 29, 2026
Retailer 13£110 GBP
Retailer 11£122 GBP
Retailer 3£136 GBP
Retailer 2£184 GBP
Retailer 1£234 GBP
Retailer 8£246 GBP
Retailer 7£259 GBP
Retailer 6£278 GBP
Retailer 5£312 GBP
Retailer 9£339 GBP
Retailer 12£347 GBP
Retailer 4£433 GBP
Retailer 10£637 GBP

37 data points across 13 retailers

22 retailers£110 GBP to £1,154 GBP

A
Cheapest Retailer
-
£110 GBP
$146 USD
A
Retailer 2
-
£122 GBP
$162 USD
View
Final sale: no returns
A
Retailer 3
-
£127 GBP
$169 USD
View
A
Retailer 4
-
£136 GBP
$181 USD
View
A
Retailer 5
-
£136 GBP
$181 USD
View
A
Retailer 6
-
£154 GBP
HK$1,600 HKD
View
B+
Retailer 7
-
£184 GBP
$245 USD
View
A
Retailer 8
-
£226 GBP
$301 USD
View
A
Retailer 9
-
£234 GBP
View
A
Retailer 10
-
£246 GBP
ZAR 5,290 ZAR
View
A
Retailer 11
-
£259 GBP
€328 EUR
View
A
Retailer 12
-
£278 GBP
View
B+
Retailer 13
-
£312 GBP
$415 USD
View
Price last confirmed 32 days ago
B+
Retailer 14
-
£339 GBP
A$694 AUD
View
B+
Retailer 15
-
£347 GBP
$462 USD
View
B+
Retailer 16
-
£375 GBP
SGD 674 SGD
View
B+
Retailer 17
-
£433 GBP
$577 USD
View
B+
Retailer 18
-
£437 GBP
$582 USD
View
B
Retailer 19
-
£479 GBP
$638 USD
View
B
Retailer 20
-
£637 GBP
View
B
Retailer 21
-
£767 GBP
$1,022 USD
View
Most Expensive
B
Queensmith
LG818644400 · Oct 27
£1,154 GBP
View
21 more retailers have this diamond
Prices start from £110 GBPSave up to £1,044 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
£110 GBP