Rude and unnecessary comment, #9.
Natural sand should not have glass in it, unless you're sourcing from a place where human litter has compromised the sand. It has silica which is commonly used in glassmaking and is also a component of quartz. Most sand has a high quartz content. Granite (the usual choice for chicken grit) also has a large amount of quartz in it, upwards of 60%.
More correctly you could have said (without the rudeness) that manmade sand or sand sourced from compromised areas or sand sourced from very specific areas with high concentration of other minerals can contain impurities or components that might be unsafe for chickens.
Natural sand should not have glass in it, unless you're sourcing from a place where human litter has compromised the sand. It has silica which is commonly used in glassmaking and is also a component of quartz. Most sand has a high quartz content. Granite (the usual choice for chicken grit) also has a large amount of quartz in it, upwards of 60%.
More correctly you could have said (without the rudeness) that manmade sand or sand sourced from compromised areas or sand sourced from very specific areas with high concentration of other minerals can contain impurities or components that might be unsafe for chickens.
