Jay-Z was spotted shopping at a luxurious jewelry store, where he bought his wife Beyonce an expensive gift for their anniversary.
Reporters assume that Jay-Z was looking at rare blue diamond gems called Lumina.
Topaz which is a light blue colored stone is known to be the stone of the 4th wedding anniversary.
Beyonce and Jay-Z got secretly married in 2008 but are considering renewing their vows this year, after they had their baby Blue Ivy.
The number 4 is the couple's lucky number, as both have their birthdays at the 4th of the month, and their baby's name Blue Ivy is inspired by the Roman number IV.