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obsidian is smooth but not basalt
the granite is more crystal than basalt
compacted
Gabbro is an intrusive rock, which means it formed underground. Basalt is an extrusive rock, which means it formed above ground .
Both quartz and rock crystal are made up primarily of silicon dioxide. The main difference between them is that rock crystal does not have any significant amount of trace elements that would color it. Quartz does contain coloring trace elements.
obsidian is smooth but not basalt
Quartzite is metamorphosed quartz sandstone. Basalt is an extrusive igneous rock.
Quartz is silicon dioxide (sand). Diamond is an allotropic form of carbon.
Quartz is a naturally occurring form of silica that often contains impurities.
Quartz movement is more traditional. Kintetic quartz relies on different principles and is a bit more accurate.
the granite is more crystal than basalt
basalt, salt rock, Quartz, and gneiss
compacted
Gabbro is an intrusive rock, which means it formed underground. Basalt is an extrusive rock, which means it formed above ground .
Both quartz and rock crystal are made up primarily of silicon dioxide. The main difference between them is that rock crystal does not have any significant amount of trace elements that would color it. Quartz does contain coloring trace elements.
The difference is in varying concentrations of quarts in each crystal.
Fused silica is an engineering-quality, amorphous version of quartz. Source: http://www.makeitfrom.com/material-data/?for=Fused-Silica-Fused-Quartz