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Round|Lab Grown|GIA

1.55ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • GIA 2474519311

Certificate GIA 2474519311

Diamond specifications and retailer prices

From £246 GBP
As of November 5, 2026
Save £973 GBP (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,219 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

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 GIA 2474519311. Listed at 16 retailers as of October 31, 2026, with prices from £246 to £1,219, a £973 spread on the same certified stone. Brilliant Earth lists it at £1,219. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginLab Grown
Grading LabGIA
CertificateGIA 2474519311
Dimensions7.39 × 7.35 × 4.60 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.39 mm7.35 mm1.55 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2474519311
Side View
Table 57.0%Crown 35°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
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: £1,219 GBP|Low: £240 GBP|High: £1,259 GBP|Avg: £565 GBP
Brilliant Earth
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
Retailer 16
November 6, 2026
Retailer 3£246 GBP
Retailer 8£280 GBP
Retailer 14£285 GBP
Retailer 15£305 GBP
Retailer 6£308 GBP
Retailer 4£410 GBP
Retailer 13£420 GBP
Retailer 16£427 GBP
Retailer 2£473 GBP
Retailer 11£488 GBP
Retailer 5£525 GBP
Retailer 7£556 GBP
Retailer 9£894 GBP
Retailer 12£979 GBP
Retailer 10£1,217 GBP
Brilliant Earth£1,219 GBP

45 data points across 16 retailers

16 retailers£246 GBP to £1,219 GBP

A
Cheapest Retailer
-
£246 GBP
A
Retailer 2
-
£280 GBP
View
Final sale: no returns
A
Retailer 3
-
£285 GBP
View
A
Retailer 4
-
£305 GBP
View
Retailer 5
-
£308 GBP
View
Price last confirmed 12 days ago
A
Retailer 6
-
£410 GBP
View
A
Retailer 7
-
£420 GBP
View
A
Retailer 8
-
£427 GBP
View
B+
Retailer 9
-
£473 GBP
View
B+
Retailer 10
-
£488 GBP
View
B+
Retailer 11
-
£525 GBP
View
B+
Retailer 12
-
£556 GBP
View
B
Retailer 13
-
£894 GBP
View
B
Retailer 14
-
£979 GBP
View
B
Retailer 15
-
£1,217 GBP
View
Most Expensive
B
Brilliant Earth
13393592A · Oct 31
£1,219 GBP
$1,640 USD
View
15 more retailers have this diamond
Prices start from £246 GBPSave up to £973 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
£246 GBP