Diamond Catalogue
Our diamond catalogue offers you over 500 carefully selected diamonds to view. Each stone has been inspected, graded and catalogued by our diamond experts.
You can search the catalogue by any diamond characteristic. To understand more about diamond characteristics, learn about the Four Cs or view our glossary.
Ralph's Selection 
Gemmologist for over 40 years, Ralph Blacklock has selected a certain number of individual stones worthy of your particular attention:
- He considers the size of the stone (carats) and its desirability
- He chooses stones that are a ‘good show’ — a well cut diamond that sparkles and has individual beauty
- He selects stones which offer you good value
- He occasionally highlights a stone which stands out for a particular reason. It could be a stone with an exceptionally rare cut or cut pattern.
The Ralph Blacklock selection is indicated by the RB logo in the left-hand column of the catalogue.
RB selected stones are sold very quickly so it is advisable that if a stone appeals make the most of the opportunity whilst it is still available.
Find your perfect diamond
When you find a stone you are interested in, you can click to request more information by e-mail, add it to My Blacklock to compare between different diamonds, or add your chosen stone to your basket to order online.
Cut to order
If a specific stone is not available we can cut a diamond to order — please feel free to talk to us at any stage about this service.
Pricing
Diamond prices are updated weekly and are based upon industry indexes.
Search our diamond catalogue
1-20 OF 482 RESULTS 1 2 3 ... 25Catalogue results
| Shape | Carat | Colour | Clarity | Cut | Price | Options | |
|---|---|---|---|---|---|---|---|
|
 Round |
0.30ct | D | VS2 | - | £478.05 | + |
|
Round |
0.30ct | D | VS2 | Excellent | £646.35 | + |
|
Round |
0.30ct | E | SI1 | Very Good | £441.60 | + |
|
Round |
0.30ct | E | SI1 | Very Good | £460.05 | + |
|
Round |
0.30ct | E | SI1 | Very Good | £460.05 | + |
|
Round |
0.30ct | E | VS2 | Very Good | £548.25 | + |
|
Round |
0.30ct | E | SI2 | Fair | £396.60 | + |
|
Round |
0.30ct | E | SI1 | Excellent | £460.05 | + |
|
Round |
0.30ct | E | VS2 | Very Good | £563.55 | + |
|
Round |
0.30ct | E | VS2 | Very Good | £563.55 | + |
|
Round |
0.30ct | F | VS2 | Very Good | £523.05 | + |
|
Round |
0.30ct | F | VS2 | Very Good | £486.60 | + |
|
Round |
0.30ct | F | VS1 | Very Good | £587.40 | + |
|
Round |
0.30ct | F | VS1 | Very Good | £587.40 | + |
|
Round |
0.30ct | F | VVS2 | Very Good | £600.00 | + |
|
Round |
0.30ct | F | VVS1 | Very Good | £695.85 | + |
|
Round |
0.30ct | F | VS2 | Very Good | £523.05 | + |
|
Round |
0.30ct | F | VVS1 | Very Good | £695.85 | + |
|
Round |
0.30ct | F | VS2 | Very Good | £523.05 | + |
|
Round |
0.30ct | G | SI1 | Very Good | £380.85 | + |