when do you traditionally buy an eternity ring
Eternity ring An eternity ring, also known as an infinity ring, is a woman's ring, worn on the hand, comprising a band of precious metal (usually gold) set with a continuous line of identically cut gemstones (usually diamonds)[1] to symbolize never-ending love, usually given by a spouse to his or her wife on the occasion of a significant anniversary, typically after 1 or more years of marriage date[citation needed] Because the presence of stones all the way round the eternity ring can make it cumbersome to wear, the alternative is to have the stones across the face of the ring only. This is sometimes referred to as a "half-eternity" ring rather than a "full" eternity ring.
Engagement ring In Western countries, it is customarily worn on the left hand ring finger, though customs vary across the world.