what things is made of glass?

玻璃係種勻㵌嘅非結晶固體，通常係將物料熔咗，而溶咗係好滐嘅。之後將佢好快降溫，降到熔點之下，等佢無時間結晶。多數玻璃原料都係二氧化矽。玻璃可以用來窗門，容器或裝飾。純玻璃係透明，硬，唔易整花，唔易有化學反應，對生物無害。佢可以整到好滑同唔透水。不過，純玻璃係好脆，爛咗碎片好尖。但係，呢啲特性可以靠加啲其他嘢，或加熱處理。一般玻璃裏面，七成都係二氧化矽。而原料係沙，或者係石英砂，裏面百分之百係結晶二氧化矽，以石英(水晶)形態出現。不過就算好純嘅石英，都有微量，少過一個百份比嘅氧化鐵，搞到佢有色。工廠工序可以將佢降到少於萬分之五。大粒水晶成份純好多，整碎佢之後，可以用來整啲高質素嘅特制玻璃。而人工造二氧化矽，純度高，就會用來整超貴嘅特制玻璃。

There are plenty.
Windows are made of glass. There are also spectacles, mirrors, lenses, prisms. Lots of glass wares. Fibre optics, and many chemistry apparatuses are made of glass.
Glass can also be used as external walls in buildings - the glass curtain.