Wikipedia:WikiProject Rocks and minerals/Main page archive

This subpage is a manual archive of old discussions and template ideas that were posted as sections on the main project page in the late 2000s.

Template

Unused template collapsed for page navigation ease click show to see

Quartz General Category Mineral Chemical formula (or Composition) Silica (silicon dioxide, SiO2) Identification Color Clear (if no impurities); also see Varieties Crystal habit 6-sided prism ending in 6-sided pyramid (typical) Crystal system Trigonal Cleavage None Fracture Conchoidal Mohs Scale hardness 7 - lower in impure varieties Luster Vitreous Refractive index 1.544-1.553 - DR +0.009 (B-G interval) Pleochroism Most varieties weak; definite in smoky quartz Streak White Specific gravity 2.65 constant; variable in impure varieties Melting point Solubility Major varieties (or Related minerals ) One way to do it: Chalcedony, Agate, Onyx, Jasper, Aventurine, Tiger's eye, Rock Crystal, Amethyst, Citrine, Rose quartz, Milk quartz (or snow quartz), Carnelian Another way to do it (preferences?): Chalcedony Any cryptocrystalline quartz, although generally only used for white or lightly coloured material. Otherwise more specific names are used. Agate Banded Chalcedony, translucent Onyx Agate where the bands are staight, parallel and consistent in size. Jasper Opaque chalcedony, impure Aventurine Translucent chalcedony with small inclusions (usually mica) that shimmer. Tiger's eye Fibrous quartz, exhibiting chatoyancy. Rock Crystal Clear, colourless Amethyst Purple, transparent Citrine Yellow to reddish orange, greenish yellow Rose quartz Pink, translucent, may display diasterism Milk quartz, or snow quartz White, translucent to opaque, may display diasterism Carnelian Reddish orange chalcedony, translucent

I based the content of this table on information found in various places:

• Rocks and Minerals:
  • quartz
  • quartzite
  • graphite

I based the format in part on the table used for chemical compounds such as:

• silicon dioxide

Explanations

• There's much discussion about colors in the infobox discussion. I don't see that, in this topic, more than one color adds any significant or obvious information. (E.g., we could do one for metamorphic rocks, one for sedimentary rocks, etc., but I don't know that it's particularly useful to do so.) Elf

• The compounds table doesn't have a title with the name of the compound; instead it's listed as a small item under General. I think it's clearer to have the name at the top, as with animals and several other table categories. Elf

Comment history from original location

Good choice of colour. It really stands out. Is it possible to condense it a bit? Maybe this should be moved to a Project space. mydogategodshat 09:45, 3 Feb 2004 (UTC)

Template (international)

Unused template collapsed for page navigation ease click show to see

Quartz Photo of quartz General Category Mineral Chemical formula (or Composition) Silica (silicon dioxide, SiO2) Crystal system Trigonal Crystal class ? Color Clear (if no impurities); also see Varieties Streak White Mohs Scale hardness 7 - lower in impure varieties Specific gravity 2.65 constant; variable in impure varieties Luster Vitreous Opacity ? Fracture Conchoidal Cleavage None Crystal habit 6-sided prism ending in 6-sided pyramid (typical) common Crystal face ? Twinning yes Crystall optics Refractive index 1.544-1.553 - DR +0.009 (B-G interval) Birefringence ? Pleochroism Most varieties weak; definite in smoky quartz Optic orientation ? Angle of the optic axis ? further characteristics chemical behavior ? Magnetism ? Melting point 1600°C Solubility ? special characteristics ? Major varieties (or Related minerals ) Chalcedony, Agate, Onyx, Jasper, Aventurine, Tiger's eye, Rock Crystal, Amethyst, Citrine, Rose quartz, Milk quartz (or snow quartz), Carnelian

This would be my suggestion. There are two reasons:

• 1. common characteristics into more details
• 2. it will be easier if to translate if its the same in all languages, as there are already some in German.

In the German project there are there missing:

• Pleochroism
• Melting point
• Solubility

I hope the translation is correct. Please have a look at it. For example:

Crystal class: is a classification by Carl Hermann und Charles-Victor Mauguin (Hermann–Mauguin notation) or Arthur Schoenflies (Schoenflies notation).

Gaucho 15:57, 9 Feb 2004 (UTC)

(Discussion moved to talk page. Elf 18:28, 12 Feb 2004 (UTC))