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Coloured quartz
Description: 

Quartz that has been washed and fire-dried on multiple occasions and that has been sieved in different grain sizes. The gravel is characterised by a very high chemical and mineral purity, is pH- neutral and is free of organic residue and salts.

Extra info: 

grain sizes in mm:
0,1-0,3
W0,1-0,3
0,3-0,8
K0,3-0,8
0,8-1,2
K0,8-1,2
K1,0-1,7
1-2
2-3
K2-3
3-4
4-6
5-8

Usage: 
between 12kg and 20kg, depending on grain size
Packaging: 
sacks of 25 kg or big bags of 1500 kg