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Round|Lab Grown|IGI

1.55ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG772678680

Shape and cutting style on the report: Round brilliant

Certificate IGI LG772678680

Diamond specifications and retailer prices

From £146 GBP
As of November 1, 2026
Save £1,258 GBP (90%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,404 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG772678680 or 772678680. Listed at 15 retailers as of November 1, 2026, with prices from £146 to £1,404, a £1,258 spread on the same certified stone. Do Amore Diamonds lists it at £1,404. 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

1.55
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG772678680
Dimensions7.42 × 7.46 × 0.00 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.42 mm7.46 mm1.55 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG772678680
Side View
Table 58.0%Crown 34.5°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 60.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £1,404 GBP|Low: £140 GBP|High: £1,404 GBP|Avg: £539 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 2, 2026
Retailer 12£146 GBP
Retailer 3£170 GBP
Retailer 14£245 GBP
Retailer 7£271 GBP
Retailer 9£324 GBP
Retailer 5£346 GBP
Retailer 10£419 GBP
Retailer 8£528 GBP
Retailer 11£554 GBP
Retailer 15£597 GBP
Retailer 4£644 GBP
Retailer 2£802 GBP
Retailer 6£803 GBP
Retailer 13£847 GBP
Do Amore Diamonds£1,404 GBP

25 data points across 15 retailers

15 retailers£146 GBP to £1,404 GBP

A
Cheapest Retailer
-
£146 GBP
A
Retailer 2
-
£170 GBP
View
B+
Retailer 3
-
£245 GBP
View
A
Retailer 4
-
£271 GBP
View
A
Retailer 5
-
£324 GBP
View
A
Retailer 6
-
£346 GBP
View
B+
Retailer 7
-
£419 GBP
View
B+
Retailer 8
-
£528 GBP
View
B+
Retailer 9
-
£554 GBP
View
B+
Retailer 10
-
£597 GBP
View
B
Retailer 11
-
£644 GBP
View
B
Retailer 12
-
£802 GBP
View
B
Retailer 13
-
£803 GBP
View
B
Retailer 14
-
£847 GBP
View
Most Expensive
B
Do Amore Diamonds
27-F2486157E · Nov 2
£1,404 GBP
$1,890 USD
View
14 more retailers have this diamond
Prices start from £146 GBPSave up to £1,258 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
£146 GBP