Kevlar is the registered trademark for a synthetic fiber developed at DuPont in 1965. This high-strength material was first commercially used in the early 1970s as a replacement for steel in racing tires. Typically it is spun into ropes or fabric sheets offering many applications, ranging from bicycle tires and racing sails to body armor. Because of its high tensile strength-to-weight ratio it is 5 times stronger than steel.
Kevlar is also a well-known component of personal armor such as combat helmets, ballistic face masks, and ballistic vests. William Henry uses woven Kevlar to create necklaces and bracelets which offer unparalleled strength and comfort.
Natural spinel is a gemstone that has become a great favorite with gem dealers and gem collectors; one might even say that spinel is for gemstone connoisseurs only.
It is a hard glassy mineral occurring as octahedral crystals of variable color and consisting chiefly of magnesium and aluminum oxides. Some spinels are among the most famous gemstones in the world: among them are the Black Prince’s Ruby and the “Timur ruby” in the British Crown Jewels, and the “Côte de Bretagne”, formerly from the French Crown jewels.