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Oval|Lab Grown|IGI

1.21ct D IF Oval Lab Grown Diamond

EX • D/IF • IGI LG756518279

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG756518279

Diamond specifications and retailer prices

From £154 GBP
$207 USD
As of November 1, 2026
Save £1,559 GBP (91%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,713 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.21ct lab-grown oval diamond

This 1.21ct lab-grown oval sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG756518279 or 756518279. Listed at 22 retailers as of October 27, 2026, with prices from £154 to £1,713, a £1,559 spread on the same certified stone. Queensmith lists it at £1,713. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG756518279
Dimensions8.65 × 6.09 × 3.71 mm
L/W Ratio1.42
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
8.65 mm6.09 mm1.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG756518279
Side View
Table 59.0%Crown 34.6°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 60.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £395 GBP|Low: £154 GBP|High: £1,535 GBP|Avg: £558 GBP|-4.9%
Retailer 1
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Retailer 21
November 3, 2026
Retailer 9£154 GBP
Retailer 6£172 GBP
Retailer 19£179 GBP
Retailer 3£192 GBP
Retailer 13£192 GBP
Retailer 17£274 GBP
Retailer 11£286 GBP
Retailer 16£364 GBP
Retailer 2£373 GBP
Retailer 1£395 GBP
Retailer 21£440 GBP
Retailer 12£516 GBP
Retailer 5£617 GBP
Retailer 8£679 GBP
Retailer 14£807 GBP
Retailer 10£836 GBP
Retailer 15£846 GBP
Retailer 4£906 GBP
Retailer 20£1,140 GBP
Retailer 18£1,326 GBP
Retailer 7£1,483 GBP

43 data points across 21 retailers

22 retailers£154 GBP to £1,713 GBP

A
Cheapest Retailer
-
£154 GBP
$207 USD
A
Retailer 2
-
£172 GBP
$231 USD
View
Final sale: no returns
A
Retailer 3
-
£179 GBP
$240 USD
View
Retailer 4
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£192 GBP
$257 USD
View
Price last confirmed 9 days ago
A
Retailer 5
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£192 GBP
$257 USD
View
A
Retailer 6
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£274 GBP
$368 USD
View
A
Retailer 7
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£286 GBP
HK$3,000 HKD
View
A
Retailer 8
-
£364 GBP
ZAR 7,902 ZAR
View
A
Retailer 9
-
£373 GBP
$500 USD
View
A
Retailer 10
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£395 GBP
View
A
Retailer 11
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£440 GBP
$591 USD
View
B+
Retailer 12
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£516 GBP
A$1,066 AUD
View
B+
Retailer 13
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£617 GBP
$828 USD
View
B+
Retailer 14
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£679 GBP
$911 USD
View
B+
Retailer 15
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£807 GBP
$1,082 USD
View
B+
Retailer 16
-
£836 GBP
SGD 1,516 SGD
View
B+
Retailer 17
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£846 GBP
View
B
Retailer 18
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£906 GBP
$1,216 USD
View
Retailer 19
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£1,140 GBP
$1,530 USD
View
Price last confirmed 13 days ago
B
Retailer 20
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£1,326 GBP
$1,780 USD
View
B
Retailer 21
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£1,483 GBP
$1,990 USD
View
Most Expensive
B
Queensmith
LG756518279 · Oct 27
£1,713 GBP
View
21 more retailers have this diamond
Prices start from £154 GBPSave up to £1,559 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
1.21ct Oval
£154 GBP