Metal: Crafted in 9K Yellow or White Gold 
Chain: Solid 1.2mm diamond-cut cable chain, available in 40cm or 45cm
Marquise dimension: 6x3mm
Diamond grade: F/G VS
Gemstone grade: A/AA

Birthstone guide:
Garnet = January
Amethyst = February
Aquamarine = March
Diamond = April
Emerald = May
Moonstone = June
Ruby = July
Peridot = August
Sapphire = September
Opal = October
Citrine = November
Tanzanite = December