20世紀

化學組成, 鍵及結構：(礦物)

化學物質包括鈣，鐵，氧化鉀，鎂，鉀，二氧化矽，鈉。

所含的礦物質包括黑雲母，長石，角礫石，斜長石，輝石，石英。

20th century

Chemical composition, bonding and structure: (Mineral)

The chemical content includes Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide, Sodium.

The mineral content include Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz.

流紋岩是一種噴出岩。它通常於花崗質岩漿到達地表的陸地或陸緣火山噴發過程中形成。 它很少在海洋爆發時產生。

原生物：(化石)

流紋岩是小晶體。 它含有石英和長石礦物。

Rhyolite is an extrusive rock. It usually forms in continental or continent-margin volcanic eruptions where granitic magma reaches the surface. Rhyolite is rarely produced at oceanic eruptions.

Living Specimens: (Fossil)

Rhyolite is small crystals. It contains quartz and feldspar minerals.

流紋岩是一種十分普遍的火山岩，它大而粗糙，斷口形狀為亞貝殼狀，而它則較為堅硬而且帶酸性。流紋岩有許多不同的顏色， 大多為灰色，白色，淺黑色。另外，它含有豐富的二氧化矽。

Rhyolite is a very common volcanic rock. It is large and coarse grained. The fracture is Sub-conchoidal. It is quite hard and acidic in nature. Rhyolite has lots of different colour. Grey, white, light black are mostly found. Also, it is rich in silica.

流紋石用於建築行業，如箭頭石，建築房屋或牆壁，建築骨料，刀具，道路骨料和刀具。 它也可以用作商業用途， 例如是寶石，實驗室檯面和珠寶

It is used in construction industry, such as arrowheads, as dimension stone, building houses or walls, construction aggregate, cutting tool, for road aggregate and knives. Commercial use are also been found. For example, gemstone, laboratory bench tops and jewelry

石基一般是由石英和斜長石組成，少量正長石，黑雲母，角閃石（輝石），輝石（角閃石）和玻璃; 斜長石和石英的斑晶，它們通常具有角閃石和/或黑雲母，有時是正長石。

二氧化矽含量是69％-77％。

Groundmass are generally of quartz and plagioclase, with lesser amounts of orthoclase, biotite, amphibole ( augite), pyroxene ( hornblende), and glass; phenocrysts of plagioclase and quartz, often with amphibole and / or biotite, sometimes orthoclase.

Silica (SiO 2) content – 69%-77%

流紋岩遍布世界各地，如中國，埃及，冰島，美國，智利和新西蘭。

Rhyolite can be found all around the world such as China, Egypt, Iceland, USA, Chile and New Zealand.