ルビー

Ruby is a precious gemstone and a variety of the mineral corundum, known for its rich red colour, which comes from trace amounts of chromium. It is one of the "big four" gemstones, alongside diamond, sapphire, and emerald, and is highly valued for its vivid hue, durability, and rarity. Rubies are renowned for their brilliance and strength, scoring 9 on the Mohs scale of hardness. Symbolizing passion, love, and power, rubies have been treasured for centuries and are often used in fine jewellery, especially in rings, necklaces, and earrings.