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Mga Produktong Matatagpuan sa Rehiyon IV - B ng Pilpinas

Manganese is a chemical element that is designated by the symbol Mn and has an atomic number of 25. It is found as the free element in nature (often in combination with iron), and in many minerals. The free element is a metal with important industrial metal alloy uses. Manganese ions are variously colored, and are used industrially as pigments and as oxidation chemicals. Manganese (II) ions function as cofactors for a number of enzymes; the element is thus a required trace mineral for all known living organisms.

Nickel is a metallic chemical element with the symbol Ni and atomic number 28. Nickel is a silvery-white metal that takes on a high polish. It belongs to the transition metals, and is hard and ductile. It occurs most usually in combination with sulfur and iron in pentlandite, with sulfur in millerite, with arsenic in the mineral nickeline, and with arsenic and sulfur in nickel glance.

Gold is a chemical element with the symbol Au (from its Latin name aurum) and atomic number 79. It is a highly sought-after precious metal which, for many centuries, has been used as money, a store of value and in jewelry. The metal occurs as nuggets or grains in rocks, underground "veins" and in alluvial deposits. It is one of the coinage metals. Gold is dense, soft, shiny and the most malleable and ductile of the known metals. Pure gold has a bright yellow color traditionally considered attractive.

Silver is a chemical element with the symbol "Ag" (Latin: argentum, from the Ancient Greek: ἀργήντος - argēntos, gen. of ἀργήεις - argēeis, "white, shining" ) and atomic number 47. A soft, white, lustrous transition metal, it has the highest electrical conductivity of any element and the highest thermal conductivity of any metal. It occurs as a pure free metal (native silver) and alloyed with gold (electrum), as well as in various minerals, such as argentite and chlorargyrite. Most silver is produced as a by-product of copper, gold, lead, and zinc mining.

Copper is a chemical element with the symbol Cu (Latin: cuprum) and atomic number 29. It is a ductile metal with excellent electrical conductivity and is rather supple in its pure state and has a pinkish luster which is (beside gold) unusual for metals which are normally silvery white. It finds use as a heat conductor, an electrical conductor, as a building material, and as a constituent of various metal alloys.

Ang ginto ay isang elementong kimikal sa talaang peryodiko na may sagisag na Au (mula sa Latin na aurum) at may bilang atomikang 79. Tinatawag din ito oro na mula sa Kastila at gold sa Ingles. Hindi nakikipagsanib ang ginto sa maraming kimikal subalit inaatake ito ng cloro, floro, aqua regia at cianuro (cyanide). Natutunaw ang ginto sa asoge o mercurio. Ang ginto ay hindi natutunaw ng asido nitriko na nakatutunaw sa maraming metal. Dahil dito ang asido nitriko ay matagal nang ginagamit upang mapatunayan kung ginto nga ang isang metal.

Ang tanso (Ingles: copper) ay isang elementong kimikal. Ito ay may bilang atomiko ng 29 at may simbolo ng Cu (mula sa salitang cuprum ng Latin). Ito ay isang malambot na metal at isang magandang konduktor ng kuryente.
Karaniwang ginagamit ang tanso bilang konduktor ng kuryente, isang materyales sa paggawa ng mga gusali, at bilang isang bahagi ng maraming mga haluang metal (alloy). Isa rin itong kinakailangang nutriente sa lahat ng mga mataas na halaman at hayop. Sa mga hayop, kasama ang tao, unang-unang matatagpuan ang tanso sa dugo. Sa sapat na dami, malason at nakakamatay ang tanso sa mga organismo.