About jewelry

Jewelry refers to ornaments that used to decorate individuals and related circumstances. Jewelry represents another significant way in which people costume themselves in the effort to self-define. Jewelry is truly an illustrator of the idea of self-definition simply because much of it is entirely non-functional. The rarer the material is made from, the more value it holds. Jewelry like this is used to mark important occasions because it was considered valuable.

Monday, October 14, 2019

Diamond open pit mining

Today, out of some 40 diamond hard rock mines mining kimberlite, approximately half are underground and another 20 or so have underground plans or hold the underground mining potential. Mining methods implemented currently at hard rock diamond mines consist of two main groups: open pit and underground.

Open pit diamond mines typically have high stripping ratios and therefore result in generation of large volumes of waste rock.

In open pit mining, a mechanical extraction method, a thick deposit is generally mined in benches or steps ,although thin deposits may require only a single bench or face. Open pit or open cast mining is usually employed to exploit a near-surface deposit or one that has a low stripping ratio. It often necessitates a large capital investment but generally results in high productivity ,low operating cost ,and good safety conditions.

Open pit mining accounts today for majority of the carats produced but underground mining is playing an increased role.
Diamond open pit mining

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