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Round|Lab Grown|GCAL

2.55ct H SI1 Round Lab Grown Diamond

ID • H/SI1

Diamond specifications and retailer prices

From £296 GBP
As of November 5, 2026
Save £1,399 GBP (83%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,695 GBP at Diamond Exchange Canada · As of November 5, 2026
View at Diamond Exchange Canada

About this 2.55ct lab-grown round diamond

This 2.55ct lab-grown round sits in the two to three carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GCAL. Listed at 4 retailers as of November 5, 2026, with prices from £296 to £1,695, a £1,399 spread on the same certified stone. Diamond Exchange Canada lists it at £1,695. 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

2.55
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGCAL
Dimensions8.81 × 8.83 × 5.38 mm
L/W Ratio1.00
Top View
8.81 mm8.83 mm2.55 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGCAL
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCuletDepth 61.0%

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: £1,695 GBP|Low: £237 GBP|High: £1,695 GBP|Avg: £649 GBP
Diamond Exchange Canada
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 20, 2026
Retailer 6£237 GBP
Retailer 5£291 GBP
Retailer 2£296 GBP
Retailer 3£316 GBP
Retailer 4£1,043 GBP
Diamond Exchange Canada£1,695 GBP

7 data points across 6 retailers

4 retailers£296 GBP to £1,695 GBP

A
Cheapest Retailer
-
£296 GBP
Retailer 2
-
£316 GBP
View
Price last confirmed 12 days ago
Retailer 3
-
£369 GBP
View
Price last confirmed 52 days ago
Most Expensive
B+
Diamond Exchange Canada
1986528184 · Nov 5
£1,695 GBP
CA$3,168 CAD
View
3 more retailers have this diamond
Prices start from £296 GBPSave up to £1,399 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
2.55ct Round
£296 GBP