"Organic silica is found in the earth's crust, and it was discovered as a water-soluble form on sand grains, from which it is harvested."
harvested
there are harvested in the spring
Oil is not harvested, crops are harvested. Oil is explored and is normally pumped out of the ground.
Silicon hexabromide
It is conventionally harvested in Sep. or Oct.
It's not harvested, it is made in a factory!
Seahorses are not harvested commercially. They are, however, important food in the chain for many of the commercially harvested fish.
Silicon and oxygen, in this form. SiO2 Silicon dioxide.
silicon and germanium
no it is not a nonmetal. Silicon is a metalloid
When is squash harvested? How and why was this important to the survival of the early colonist?
They are usually harvested in late Summer.