Diamond Manufacturing
Explore the transformation of rough diamonds into polished gemstones through specialist instruction and practical study.
A day on how a polished diamond is actually made: how a rough stone is read, how the cutting decisions are taken, and how each decision influences the characteristics of the finished diamond.
You handle rough through the day, and develop the knowledge to explain the principal stages of diamond manufacturing to clients.
Who the course is for
Sales teams
Anyone selling natural diamonds who wants to describe how the stone in front of a customer was made.
New entrants
Those who know the 4Cs and now want to see where a polished diamond actually comes from.
Designers and makers
People who specify stones and want to understand the relationship between rough-diamond characteristics and cutting decisions.
Learning outcomes
- 01Follow a diamond from rough crystal through to finished polished stone
- 02Understand planning, sawing, bruting and polishing, and what each stage decides
- 03Explain how the cutting decisions shape the finished stone
- 04Handle rough diamonds and recognise what they can become
- 05Describe the supply chain from mine to market accurately
- 06Answer a customer’s questions about how a diamond was made
Craig Sievewright
Thirty-four years at De Beers, across rough, polished and special stones.
A renowned rough and polished diamond specialist, Craig teaches from that career rather than from a syllabus.
Register now
Registration for every LDB course goes through the same form. There is no separate booking system and no payment at this stage.
Complete the form
Your details, the course you want and a short summary of your experience in the trade. Photographic identification and proof of address are required, as they are for anyone coming into the building.
We contact you within 24 hours
The office confirms the next available date, the fee and whether the member rate applies to you. Nothing is charged until the place is agreed.
Your place is confirmed
An invoice follows, with joining instructions and what to bring. Dates are set against demand, so tell us if you have a deadline.
Included in the fee: your own diamond grading kit to keep, and a certificate of completion. Courses can also be run privately for a team — please contact the office for a quotation.
Other courses
Practical Diamond Knowledge
Develop the knowledge and confidence to discuss polished diamonds accurately with clients.
Selling Coloured Gemstones with Confidence
Develop specialist knowledge to present and sell coloured gemstones with accuracy and confidence.