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Round|Lab Grown|IGI

1.00ct G VS1 Round Lab Grown Diamond

ID • G/VS1 • IGI LG816606638

Shape and cutting style on the report: Round brilliant

Certificate IGI LG816606638

Diamond specifications and retailer prices

From £124 GBP
$166 USD
As of November 1, 2026
Save £697 GBP (85%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £821 GBP at Helzberg Diamonds · As of October 31, 2026
View at Helzberg Diamonds

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG816606638 or 816606638. Listed at 21 retailers as of October 31, 2026, with prices from £124 to £821, a £697 spread on the same certified stone. Helzberg Diamonds lists it at £821. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816606638
Dimensions6.41 × 6.38 × 3.97 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
6.41 mm6.38 mm1.00 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816606638
Side View
Table 57.0%Crown 35.2°Girdle: MediumPavilion 40.9°Culet: NoneDepth 62.1%

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: Nov 1
Current: £265 GBP|Low: £118 GBP|High: £810 GBP|Avg: £323 GBP|-1.2%
Retailer 1
Retailer 2
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Retailer 11
Retailer 12
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Retailer 19
November 1, 2026
Retailer 8£124 GBP
Retailer 6£139 GBP
Retailer 16£144 GBP
Retailer 2£154 GBP
Retailer 5£154 GBP
Retailer 14£264 GBP
Retailer 1£265 GBP
Retailer 12£270 GBP
Retailer 13£273 GBP
Retailer 3£277 GBP
Retailer 11£299 GBP
Retailer 19£334 GBP
Retailer 15£375 GBP
Retailer 10£388 GBP
Retailer 17£401 GBP
Retailer 9£494 GBP
Retailer 7£535 GBP
Retailer 18£722 GBP
Retailer 4£810 GBP

39 data points across 19 retailers

21 retailers£124 GBP to £821 GBP

A
Cheapest Retailer
-
£124 GBP
$166 USD
A
Retailer 2
-
£144 GBP
$193 USD
View
Retailer 3
-
£154 GBP
$206 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
£154 GBP
$206 USD
View
A
Retailer 5
-
£215 GBP
$288 USD
View
B+
Retailer 6
-
£264 GBP
ZAR 5,711 ZAR
View
B+
Retailer 7
-
£265 GBP
View
B+
Retailer 8
-
£270 GBP
View
B+
Retailer 9
-
£273 GBP
€349 EUR
View
B+
Retailer 10
-
£277 GBP
$371 USD
View
Retailer 11
-
£299 GBP
$400 USD
View
Price last confirmed 28 days ago
B+
Retailer 12
-
£334 GBP
$447 USD
View
B+
Retailer 13
-
£375 GBP
A$772 AUD
View
B+
Retailer 14
-
£388 GBP
$520 USD
View
B+
Retailer 15
-
£401 GBP
$537 USD
View
B
Retailer 16
-
£494 GBP
$662 USD
View
B
Retailer 17
-
£528 GBP
$708 USD
View
B
Retailer 18
-
£535 GBP
$717 USD
View
B
Retailer 19
-
£722 GBP
View
B
Retailer 20
-
£810 GBP
$1,085 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOHMMGMMJO · Oct 31
£821 GBP
$1,100 USD
View
20 more retailers have this diamond
Prices start from £124 GBPSave up to £697 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
£124 GBP