Femininity
Definition and characteristics of femininity Femininity is a set of attributes, behaviors, and roles associated with women and girls. It is socially constructed and influenced by cultural and biological factors....
Glossary
Faceting machine
Faceting Machines and Components Ultra-Tec, Facetron, Graves, and Poly-Metric are common non-commercial faceting machine brands. Prices for these machines range from $1,800 to over $5,500. Additional equipment and supplies are...
Extraterrestrial diamonds
Diamonds in Meteorites and Extraterrestrial Materials Nanodiamonds found in primitive meteorites indicate they came from outside the Solar System. Nanodiamonds make up about 3% of the carbon in meteorites. Silicon...
Exploration diamond drilling
History and Development of Diamond Drilling Rodolphe Leschot invented the first core bit in 1863. Early diamond drilling opened up new areas for mineral mining. Portable diamond drills revolutionized mineral...
Eternity ring
History of the Eternity Ring Diamond eternity ring created in the 1960s by De Beers De Beers had a secret agreement with the Soviet Union for diamond control Prevailing fashion...
Engraved gem
Engraved Gem Technique Gemstones were cut using abrasive powder from harder stones and a hand-drill or lathe. Magnifying lenses were not used by gem cutters in antiquity. Medieval gem-carving techniques...