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Round|Lab Grown|GCAL

1.51ct H SI1 Round Lab Grown Diamond

VG • H/SI1

Diamond specifications and retailer prices

From £961 GBP
CA$1,788 CAD
As of October 30, 2026
4 retailers carry this diamond
Most expensive: £961 GBP at Diamond Exchange Canada
View at Diamond Exchange Canada

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GCAL. Listed at 4 retailers as of October 30, 2026. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabGCAL
Dimensions7.42 × 7.44 × 4.49 mm
L/W Ratio1.00
Top View
7.42 mm7.44 mm1.51 ctH / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGCAL
Side View
Table 58.0%CrownGirdle: MED-STKPavilionCuletDepth 60.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 30
Current: £961 GBP|Low: £155 GBP|High: £961 GBP|Avg: £444 GBP
Diamond Exchange Canada
Retailer 2
Retailer 3
October 1, 2026
Retailer 2£155 GBP
Retailer 3£205 GBP
Diamond Exchange Canada£961 GBP

4 data points across 3 retailers

4 retailers

Retailer 1
-
£155 GBP
$208 USD
Price last confirmed 38 days ago
Retailer 2
-
£203 GBP
$272 USD
View
Price last confirmed 47 days ago
Retailer 3
-
£203 GBP
$272 USD
View
Price last confirmed 46 days ago
Most Expensive
B+
Diamond Exchange Canada
1986532084 · Oct 30
£961 GBP
CA$1,788 CAD
View
3 more retailers have this diamond

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+
1.51ct Round
£961 GBP