zircon

"My grandmother wore a beautiful pearl necklace to the family dinner. "

"The liftoff will occur in exactly twelve seconds."

"The jeweler carefully polished the emerald, a beautiful green gemstone. "

"My sometimes neighbor, a retired teacher, still visits the school occasionally. "

"The new sports car was incredibly expensive, costing more than my entire year's savings. "

"The ceramic tile on the bathroom floor had a tetragonal shape. "

"The laboratory technician used a small amount of zirconia powder to make the special light for the demonstration. "

"The project consists of three main parts. "

"The geologist studied the rocks in the park. "

"The saw is coated with diamond."

"The sugar in the candy formed tiny, sparkling crystals. "

"Hey, beautiful!"