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Round|Lab Grown|IGI

1.23ct D VVS1 Round Lab Grown Diamond

ID • D/VVS1 • IGI LG778645707

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778645707

Diamond specifications and retailer prices

From £160 GBP
$214 USD
As of October 29, 2026
Save £1,508 GBP (90%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,668 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG778645707 or 778645707. Listed at 24 retailers as of October 27, 2026, with prices from £160 to £1,668, a £1,508 spread on the same certified stone. Queensmith lists it at £1,668. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
D
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778645707
Dimensions6.92 × 6.98 × 4.18 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
6.92 mm6.98 mm1.23 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778645707
Side View
Table 58.0%Crown 33.2°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 60.4%

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: £360 GBP|Low: £153 GBP|High: £802 GBP|Avg: £383 GBP|+6.0%
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 31, 2026
Retailer 3£160 GBP
Retailer 8£178 GBP
Retailer 5£198 GBP
Retailer 4£267 GBP
Retailer 7£315 GBP
Retailer 10£340 GBP
Retailer 1£360 GBP
Retailer 6£365 GBP
Retailer 11£483 GBP
Retailer 2£512 GBP
Retailer 12£608 GBP
Retailer 13£754 GBP
Retailer 9£797 GBP

35 data points across 13 retailers

24 retailers£160 GBP to £1,668 GBP

A
Cheapest Retailer
-
£160 GBP
$214 USD
A
Retailer 2
-
£178 GBP
$238 USD
View
Final sale: no returns
A
Retailer 3
-
£185 GBP
$248 USD
View
A
Retailer 4
-
£198 GBP
$265 USD
View
A
Retailer 5
-
£198 GBP
$265 USD
View
A
Retailer 6
-
£220 GBP
HK$2,300 HKD
View
B+
Retailer 7
-
£267 GBP
$358 USD
View
A
Retailer 8
-
£315 GBP
View
A
Retailer 9
-
£340 GBP
ZAR 7,356 ZAR
View
B+
Retailer 10
-
£360 GBP
€459 EUR
View
B+
Retailer 11
-
£365 GBP
View
B+
Retailer 12
-
£366 GBP
$491 USD
View
B+
Retailer 13
-
£379 GBP
$508 USD
View
B+
Retailer 14
-
£483 GBP
A$996 AUD
View
B
Retailer 15
-
£512 GBP
$686 USD
View
Retailer 16
-
£608 GBP
$815 USD
View
Price last confirmed 11 days ago
B
Retailer 17
-
£636 GBP
$852 USD
View
B
Retailer 18
-
£642 GBP
SGD 1,163 SGD
View
B
Retailer 19
-
£675 GBP
$905 USD
View
B
Retailer 20
-
£678 GBP
$908 USD
View
Retailer 21
-
£754 GBP
$1,010 USD
View
Price last confirmed 15 days ago
B+
Retailer 22
-
£797 GBP
View
B
Retailer 23
-
£923 GBP
$1,237 USD
View
Most Expensive
B
Queensmith
LG778645707 · Oct 27
£1,668 GBP
View
23 more retailers have this diamond
Prices start from £160 GBPSave up to £1,508 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
1.23ct Round
£160 GBP