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Round|Lab Grown|GCAL

2.59ct H SI1 Round Lab Grown Diamond

ID • H/SI1

Diamond specifications and retailer prices

From £299 GBP
As of November 5, 2026
Save £1,422 GBP (83%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,722 GBP at Diamond Exchange Canada · As of November 5, 2026
View at Diamond Exchange Canada

About this 2.59ct lab-grown round diamond

This 2.59ct 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 8 retailers as of November 5, 2026, with prices from £299 to £1,722, a £1,422 spread on the same certified stone. Diamond Exchange Canada lists it at £1,722. 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

2.59
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGCAL
Dimensions8.81 × 8.82 × 5.43 mm
L/W Ratio1.00
Top View
8.81 mm8.82 mm2.59 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGCAL
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCuletDepth 61.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,722 GBP|Low: £241 GBP|High: £1,722 GBP|Avg: £651 GBP
Diamond Exchange Canada
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 20, 2026
Retailer 6£241 GBP
Retailer 5£294 GBP
Retailer 2£299 GBP
Retailer 3£320 GBP
Retailer 4£1,058 GBP
Diamond Exchange Canada£1,722 GBP

7 data points across 6 retailers

8 retailers£299 GBP to £1,722 GBP

Retailer 1
-
£241 GBP
Price last confirmed 45 days ago
Retailer 2
-
£279 GBP
View
Price last confirmed 44 days ago
Retailer 3
-
£294 GBP
View
Price last confirmed 45 days ago
B+
Retailer 4
-
£299 GBP
View
Retailer 5
-
£320 GBP
View
Price last confirmed 12 days ago
Retailer 6
-
£374 GBP
View
Price last confirmed 52 days ago
Retailer 7
-
£1,058 GBP
View
Price last confirmed 46 days ago
Most Expensive
B+
Diamond Exchange Canada
1986528094 · Nov 5
£1,722 GBP
CA$3,219 CAD
View
7 more retailers have this diamond
Prices start from £299 GBPSave up to £1,422 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.

B+
2.59ct Round
£299 GBP