Quartz
a.Gypsum b.Diamond c.Quartz d.Calcite
sand is crushed up rocks into fine grains but the specific thing that makes glass is the Silicon Dioxide
you can melt sand in very high temperatures, mix it with certain minerals, then it will harden into glass.
Sand (silicon dioxide)
lotrs of sand
Yes, glass is made by melting glass and then blowing it into a bubble with a long tube. After the bubble dries. It is glass.
Glass is made when several minerals are melted together at high temperatures. Silica (the main ingredient) in the form of sand is combined with soda ash and limestone and is melted in a furnace at 1700°C. Other materials can be added to create different colour properties.
Glass is manufactured primarily from the mineral quartz (SiO2) which is what sand is made from. However small amounts of other minerals are added to the sand to make the process easier. These minerals are:- sodium carbonate (Na2CO3) lime (calcium oxide (CaO) magnesium oxide (MgO) aluminum oxide (Al2O3) There are also other minerals which are added to make specialised glasses. e.g. Pyrex glass is made from sand and boron oxide.
not forever, but for a long time. glass can be broken down as it has sand and other minerals in it. so in answer to your question, no.
A mixture.
It all depends on where the sand is sourced from, as sand is simply crushed rocks weathered down over millions of years. It is used in the manufacture of glass and silicon.
quartz