A period is a bleed from the womb (uterus) that is released through the vagina. It happens approximately every 28 days, although anywhere between 24 and 35 days is common. Periods can begin when girls are between 8 and 16 years old, but usually start around the age of 12.
Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium and sometimes vanadium. Beryl has a hardness of 7.5â8 on the Mohs scale. Most emeralds are highly included, so their toughness (resistance to breakage) is classified as generally poor.
Emerald is an extremely rare gem in Minecraft (even rarer than the Diamond). It is the main currency used in the Villager trading system. Emeralds can be mined from Emerald Ore, which can only be found in Extreme Hills Biomes and Roofed Forest Biomes, making them extremely rare to find. Emeralds will only drop when mined with a Pickaxe made of Iron or Diamond.