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Round|Lab Grown|IGI

1.22ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG685511105

Shape and cutting style on the report: Round brilliant

Certificate IGI LG685511105

Diamond specifications and retailer prices

From £145 GBP
As of November 5, 2026
Save £731 GBP (83%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £876 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.22ct lab-grown round diamond

This 1.22ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG685511105 or 685511105. Listed at 22 retailers as of November 5, 2026, with prices from £145 to £876, a £731 spread on the same certified stone. Reve Diamonds lists it at £876. 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

1.22
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685511105
Dimensions6.87 × 6.85 × 4.24 mm
L/W Ratio1.00
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
6.87 mm6.85 mm1.22 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685511105
Side View
Table 57.0%Crown 33.9°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.8%

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 5
Current: £354 GBP|Low: £144 GBP|High: £876 GBP|Avg: £389 GBP|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Reve Diamonds
November 6, 2026
Retailer 7£145 GBP
Retailer 5£162 GBP
Retailer 16£169 GBP
Retailer 2£180 GBP
Retailer 3£180 GBP
Retailer 4£314 GBP
Retailer 11£325 GBP
Retailer 10£342 GBP
Retailer 1£354 GBP
Retailer 17£363 GBP
Retailer 9£364 GBP
Retailer 15£385 GBP
Retailer 12£483 GBP
Retailer 8£579 GBP
Retailer 13£581 GBP
Retailer 6£618 GBP
Retailer 14£841 GBP
Reve Diamonds£876 GBP

34 data points across 18 retailers

22 retailers£145 GBP to £876 GBP

A
Cheapest Retailer
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£145 GBP
A
Retailer 2
-
£162 GBP
View
Final sale: no returns
A
Retailer 3
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£169 GBP
View
Retailer 4
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£180 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
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£180 GBP
View
B+
Retailer 6
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£291 GBP
View
B+
Retailer 7
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£314 GBP
View
B+
Retailer 8
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£325 GBP
View
B+
Retailer 9
-
£342 GBP
View
B+
Retailer 10
-
£354 GBP
View
B+
Retailer 11
-
£363 GBP
View
B+
Retailer 12
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£364 GBP
View
B+
Retailer 13
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£385 GBP
View
B+
Retailer 14
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£476 GBP
View
B
Retailer 15
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£483 GBP
View
B
Retailer 16
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£491 GBP
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Retailer 17
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£574 GBP
View
Price last confirmed 46 days ago
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Retailer 18
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£579 GBP
View
B
Retailer 19
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£581 GBP
View
B
Retailer 20
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£618 GBP
View
B
Retailer 21
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£841 GBP
View
Most Expensive
B
Reve Diamonds
7ADD410F2 · Nov 6
£876 GBP
$1,179 USD
View
21 more retailers have this diamond
Prices start from £145 GBPSave up to £731 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
1.22ct Round
£145 GBP