RE: Diamonds w/c 17th November11 Nov 2025 18:13
Key information shown in a rough diamond tender catalogue includes:
Weight: The carat weight of individual stones or parcels (groups of similar stones).
Size: Often determined using a set of sieves for smaller diamonds, with ranges specified in the catalogue.
Shape/Crystalline Structure: A description of the natural crystal form, such as octahedral, dodecahedral, macle, cubic, or irregular shapes, as this greatly impacts cutting potential.
Color: The color grade or range, as color is a primary value determinant.
Clarity: Information on internal and external imperfections or inclusions, which influences the potential clarity of the finished gem.
Surface Appearance: Details on the external texture, such as frosting or the presence of a "skin" or coating that might hide internal features (sometimes called "speculation stones").
Origin/Provenance: The mine or source of the diamonds. Many sellers do not mix diamonds from different mines, as origin can indicate unique characteristics.
Potential Yield Analysis: For some larger or higher-value stones, advanced information might be provided, such as 3D scans or mapping data of inclusions, which allows buyers to estimate the optimal polished diamond shape, size, color, and clarity that can be produced.
Parcelling Details: If stones are bundled into parcels, the catalogue specifies the quantity, average characteristics, and total carat weight for that specific parcel.
Pricing (often indicative): While the tender is a bidding process, the catalogue or related price lists may offer an approximate market price indicator or a reserve price for the goods.
Aneyone care the share ;)