Integrative Levels Classification project ILC2 developing schedules how it works builder meetings people references
ILC class g63

ILC developing version
Expanded class g63

   ▲  broader class

▽ ⌕         g63   [ann]           of hardness in Mohs scale
▽ ⌕         g63p                 1; talc hardness
▽ ⌕         g63q                 2; gypsum hardness
▽ ⌕         g63r                 3; calcite hardness
▽ ⌕         g63s                 4; fluorite hardness
▽ ⌕         g63t                 5; apatite hardness
▽ ⌕         g63u                 6; orthoclase feldspar hardness
▽ ⌕         g63v                 7; quartz hardness  ← gtstb quartz
▽ ⌕         g63w                 8; topaz hardness
▽ ⌕         g63x                 9; corundum hardness
▽ ⌕         g63y                 10; diamond hardness
 
Connected classes:
 

specificity 
current: 99 

   
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ILC developing version — ISKO Italia <https://www.iskoi.org/ilc/> : 2006.03.06 - 2026.05.14 -