Carat (ct)
Definition: Carat (symbol: ct) na mass unit wey equal exactly 200 milligrams, or 0.2 grams. Dem dey use am mainly for gemstones and pearls.
History/origin: Carat start from carob seed, wey people use before as rough standard to weigh gemstones because the seeds size dey nearly the same. Metric carat come become standard for early 20th century.
Current use: Carats dey used almost only for jewellery and gem trade to describe the weight of diamonds and other precious stones.