The Birthstones.

Two bracelets with garnet beads on a wrist, labeled "Garnet January Birthstone."
Two amethyst necklaces on gray fabric with 'Amethyst February Birthstone' text.
Gold aquamarine earrings on display with "Aquamarine March Birthstone" text.
Gold hoop earrings with pearl dangles on gray fabric with 'Pearl June Birthstone' text.
Emerald necklace displayed on gray fabric with white cloth, labeled "Emerald May Birthstone."
Close-up of a hand holding a clear quartz pendant on a gold chain, labeled as the April birthstone.
Carnelian earrings on gray surface with "Carnelian July Birthstone" text
Several peridot rings worn on fingers, highlighting August birthstone, with green gemstones and gold wire wrapping.
Sapphire bead necklaces with gold and silver chains on gray fabric, featuring the text "Sapphire September Birthstone."
Opalite rings, gold and silver settings, on satin fabric; text: "Opalite October Birthstone."
Hand wearing citrine rings, November birthstone
Gold chain bracelet with turquoise stone, December birthstone, on wrist.