Quartz is one of the more abundant minerals of crustal rock.Quartz is very common, although larger quartz crystals are less common, but still found in good supply.
it depends on its color and size. Keep in mind that topaz is more expensive than Quartz
Hematite is far denser than water.
No, standard hematite, a form of iron oxide, is not attracted to a magnet. See the related link to the right for more information on hematite from a layperson's point of view.
Quartz is usually a little more expensive than granite. Quartz is harder than granite and less likely to ship or stain, though I have had granite for over a year now in my kitchen and love it!
There are more than 4,000 recognized minerals. Examples of minerals include halite, pyrite, hematite, calcite, gold, silver, quartz, feldspar, mica, gypsum, lepidolite, ruby, diamond, topaz, and graphite.
This is a very broad question, but simply put, quartz countertops are counters which are made of the naturally occurring stone, "quartz". These are extremely similar to granite countertops in that they are very durable and similar in appearance. Quartz countertops typically run for about 50$ a square foot which is on the more expensive side of the spectrum as far as counters go.
Quartz movement is more traditional. Kintetic quartz relies on different principles and is a bit more accurate.
Citrine is a variety of quartz.
Hematite is a mineral. This is from wikipedia: A mineral is a naturally occurring solid with a definite chemical composition and a specific crystalline structure. A rock is an aggregate of one or more minerals. Have a look at this page in wiki about hematite: http://en.wikipedia.org/wiki/Haematite
Be more specific, what do you mean by quartz?: Are you talking about the quartz in side an atom? A unit of measurement? Or possibly a type of rock?
No, there is no substitute for quartz (silicon dioxide) as it has several special properties that no other mineral has (e.g. transparent to both ultraviolet and visible light). However if you are just looking for a different mineral than quartz that can be used as a source of silicon for use in semiconductors and silicone oils and plastics, yes there are other silicon based minerals but they are more complex than quartz is chemically which sometimes makes extracting the silicon more difficult and expensive.