Private B2B diamond desk · New York · Mumbai
Search one stone.
Or search the whole list.
Need one perfect stone? Search it. Building a collection? Send the list. Every line comes back priced against live inventory — ready for costing and review.
The Siemme engine
The whole piece, priced in one pass.
A jewel is never just one diamond. Centre, sides, melee — and a budget that has to hold. Send the piece as you have it. One sheet comes back, every line priced.
- 1Start with what you haveAn Excel list, a design brief, a sketch, a CAD file. If it describes the piece, it's enough for us.
- 2Every line, matched at onceThe engine reads your requirement and runs it against Siemme’s active stock table.
- 3One sheet backMatched stones, close alternatives where they genuinely help, and the diamond total for the piece.
- 4Your afternoon, returnedCosting that took days of back-and-forth lands while the design is still warm.
For buyers
One stone or two hundred lines. Same easy flow.
Search stone by stone, filter by filter — and when the project grows, the same desk carries the whole list.
Search
Filter by shape, carat, colour, clarity, certificate and price across live, hourly-refreshed stock.
Send a list
Upload your full requirement — sizes, qualities, quantities, target prices — in one file.
Review options
Exact matches and alternatives with delivery notes and clear price logic, line by line.
Confirm
Hold, certificate check, invoice, payment terms and shipping — handled by one desk.
For suppliers
Good stock deserves qualified buyers.
Share your inventory once. We put it in front of vetted buyers — and your list stays private.
Verified sharing
Upload after trade login. Established suppliers move to scheduled FTP feeds — several already run hourly.
Clean data
Every row is checked on arrival — carat, certificate, media, pricing — so your stock always shows at its best.
Commercially private
Buyers see a Siemme offer, never your raw spreadsheet. Pricing and priority logic stay between us.
Buyer desk
Send us the list.
CSV shows a first pass right away; Excel, PDF and notes reach the desk for review. Either way, it comes back priced.
About
A desk you can call.
Behind the search bar is a working desk in New York and Mumbai — people who grade, price and ship stones every day. Natural and lab-grown, held to the same eye. Call, and someone who knows your order picks up.
New York · Mumbai
+1 212 398 9666
+1 917 209 6000 (WhatsApp)
info@siemme.com
GIA · IGI certified stones