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Round|Lab Grown|IGI

1.55ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG768651128

Shape and cutting style on the report: Round brilliant

Certificate IGI LG768651128

Diamond specifications and retailer prices

From £248 GBP
$332 USD
As of October 29, 2026
Save £1,923 GBP (89%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £2,171 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.55ct lab-grown round diamond

This 1.55ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG768651128 or 768651128. Listed at 27 retailers as of October 27, 2026, with prices from £248 to £2,171, a £1,923 spread on the same certified stone. Queensmith lists it at £2,171. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG768651128
Dimensions7.35 × 7.39 × 4.60 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
7.35 mm7.39 mm1.55 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG768651128
Side View
Table 56.0%Crown 36°Girdle: MediumPavilion 40.6°Culet: NoneDepth 62.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: £1,940 GBP|Low: £238 GBP|High: £2,985 GBP|Avg: £781 GBP|-35.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
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Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
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Retailer 15
October 30, 2026
Retailer 4£248 GBP
Retailer 15£281 GBP
Retailer 6£307 GBP
Retailer 7£414 GBP
Retailer 14£422 GBP
Retailer 10£491 GBP
Retailer 11£528 GBP
Retailer 13£528 GBP
Retailer 8£549 GBP
Retailer 12£717 GBP
Retailer 2£761 GBP
Retailer 3£1,079 GBP
Retailer 9£1,239 GBP
Retailer 5£1,313 GBP
Retailer 1£1,940 GBP

33 data points across 15 retailers

27 retailers£248 GBP to £2,171 GBP

A
Cheapest Retailer
-
£248 GBP
$332 USD
A
Retailer 2
-
£281 GBP
$377 USD
View
Final sale: no returns
A
Retailer 3
-
£287 GBP
$385 USD
View
A
Retailer 4
-
£307 GBP
$412 USD
View
A
Retailer 5
-
£307 GBP
$412 USD
View
A
Retailer 6
-
£344 GBP
HK$3,600 HKD
View
A
Retailer 7
-
£414 GBP
$555 USD
View
A
Retailer 8
-
£422 GBP
$565 USD
View
A
Retailer 9
-
£491 GBP
€626 EUR
View
A
Retailer 10
-
£528 GBP
A$1,088 AUD
View
A
Retailer 11
-
£528 GBP
ZAR 11,435 ZAR
View
A
Retailer 12
-
£549 GBP
View
A
Retailer 13
-
£556 GBP
$745 USD
View
A
Retailer 14
-
£717 GBP
A$1,477 AUD
View
B+
Retailer 15
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£755 GBP
$1,011 USD
View
B+
Retailer 16
-
£761 GBP
$1,019 USD
View
Retailer 17
-
£838 GBP
$1,123 USD
View
Price last confirmed 44 days ago
B+
Retailer 18
-
£985 GBP
SGD 1,784 SGD
View
B+
Retailer 19
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£988 GBP
$1,324 USD
View
B+
Retailer 20
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£1,021 GBP
$1,368 USD
View
B+
Retailer 21
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£1,046 GBP
$1,402 USD
View
B+
Retailer 22
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£1,079 GBP
$1,446 USD
View
B+
Retailer 23
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£1,206 GBP
$1,615 USD
View
B+
Retailer 24
-
£1,239 GBP
View
Retailer 25
-
£1,313 GBP
A$2,706 AUD
View
Price last confirmed 22 days ago
B
Retailer 26
-
£1,940 GBP
$2,600 USD
View
Most Expensive
B
Queensmith
LG768651128 · Oct 27
£2,171 GBP
View
26 more retailers have this diamond
Prices start from £248 GBPSave up to £1,923 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
1.55ct Round
£248 GBP