A petite raw gemstone nugget hangs from a simple gold-plated chain, 18 inches long with a lobster claw clasp.
 
Stones range from 1/4 to 3/8 inches in diameter. Photos are examples of similar pieces; yours will not be the exact stone shown.
 
January: Garnet
February: Amethyst
March: Aquamarine
April: Herkimer "Diamond" (quartz)
May: Emerald
June: Moonstone
July: Ruby
August: Peridot
September: Sapphire
October: Pink Opal
November: Citrine
December: Turquoise (synthetic)
 
By Geometric Gem, a Philly-based one-woman business.
Photos by Geometric Gem.