equilateral gem gemstone jewel parallelogram rhinestone allotrope corundum ice lozenge paragon rhombus rock solitaire zircon bort brilliant jager sparkler rhomboid diamonds stone bijou bauble ornament hardware glass baguette cabochon bead trinket jewelry jewellery nugget birthstone gewgaw gimcrack novelty bibelot kickshaw curio curiosity tchotchke gaud trifle knickknack toy ornamental doodad whatnot bagatelle nicknack plaything furbelow folderol objet gadget nothing charm junk stadium arena ground field track ring bowl coliseum pitch course amphitheater enclosure racecourse circus hippodrome colosseum amphitheatre racetrack speedway garden gymnasium pit dome grandstand cirque stand velodrome gridiron stade astrodome manège forum venue rink theatre stage platform park auditorium hall