powder specific gravity
21Pyrope — A gem quality, emerald cut pyrope. General Category Nesosilicate Chemical formula …
22Aquamarine — Infobox mineral name = Aquamarine category = beryl variety boxwidth = boxbgcolor = imagesize = 250 caption = Aquamarine formula = Be3Al2Si6O18 molweight = color = transparent (or can be translucent if included), greenish blue to blue green,… …
23Turquoise — For other uses, see Turquoise (disambiguation). Turquoise Turquoise (tumble finished) one inch (25 mm) long. This pebble is greenish and therefore low grade General …
24Djurleite — pseudomorph after pyrite from New Mexico, specimen size 2.4 cm General Category Copper sulfide …
25List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
26Gas pycnometer — A gas pycnometer, a type of pycnometer, is a laboratory device used for measuring the density or more accurately the volume of solids, be they regularly shaped, porous or non porous, monolithic, powdered, granular or in some way comminuted,… …
27Graphite — For other uses, see Graphite (disambiguation). Graphite Graphite specimen General Category Native element mineral …
28mineral processing — or ore dressing Mechanical treatment of crude ores to separate the valuable minerals. Mineral processing was at first applied only to ores of precious metals but later came to be used to recover other metals and nonmetallic minerals. It is also… …
29METALS AND MINING — In the Bible Six metals are mentioned in the Bible and in many passages they are listed in the same order: gold, silver, copper, iron, tin, and lead. Antimony is also mentioned. The metals are referred to in various contexts, including methods of …
30Allotropes of carbon — Eight allotropes of carbon: a) Diamond, b) Graphite, c) Lonsdaleite, d) C60 (Buckminsterfullerene or buckyball), e) C540, f) C70, g) Amorphous carbon, and h) single walled carbon nanotube or buckytube. This is a list of the allotropes of carb …
