3RD (QUIZ 3.3)

• Gems are precious or semiprecious stones formed from rock materials that were subjected to high temperature and pressure over a long period of time.
• Diamond comes from what used to be wood millions of years ago but was buried deep under Earth.
• A common gemstone found in the Philippines is nephrite or jade.
• There are two distinct types of mineral that are classified as jade: nephrite and jadeite.
• Philippine jade has been identified as a type of nephrite.
• Chromium is responsible for the red color of ruby.
• Titanium and Iron gives sapphire its deep color blue color.
• Emerald, a green gemstone is a type of beryl, a mineral consisting of beryllium and aluminum silicate.
• Turquoise is an opaque blue-green gemstone. They were first mined in the Sinai Peninsula and China.
• Coal is an organic sedimentary rock that is burned as a fuel.
• Coal is a form of fossil fuel, which refers to organic materials that have experienced physical and chemical transformations over a long period of time.
• Coal is a naturally occurring black or dark brown rock that is composed mainly of carbon and small amounts if hydrogen, nitrogen, oxygen, and sulfur.
• A piece of coal looks like a piece of charcoal, but coal is dense and heavy while charcoal is porous and light.
• The two forms of coal is bituminous and anthracite coal.
• Of the two forms of coal, anthracite is more mature, heavier, and of higher quality as an energy source.
• Coal remains the largest source of electricity worldwide. It is also the largest source of humanmade carbon dioxide, which is responsible for global warming.
• China is the world's top producer of coal. In the ASEAN region, Indonesia is the biggest producer,
• Semirara Mining Corporation contributes more than 90 percent of the country's coal production.
• Coal is used in the Philippines to generate electricity and manufacture cement.
• High-quality coal in the Philippines may be found in Malangas, Zamboanga Sibugay, Province.
• Mining is the extraction of valuable geological matter such as ores, minerals, and stones.
• Mine tailings are materials that remain after extraction for ore minerals.
• Mine tailings should be kept inside earthen ponds called tailing dams.
• Mercury is toxic to human body. It results in various deformities and may also cause cancer.
• Energy Conservation will help cut the demand for more coal and petroleum.
• "No Go Zones" should be identified and respected.
• The Philippine Mining Act of 1995 required mining companies to develop their host communities.
• Acts that are considered environmental protection and enhancement are rehabilitation, regeneration, revegetation, and reforestation to preserve area's biodiversity.
• Dr. Bibiano Rañes is the head of the mining rehabilitation and reforestation area in Rio Tuba and is responsible for converting post-mining land into agricultural land.
• Diamond comes from what used to be wood millions of years ago. The biggest diamond mines are in Africa.