The genuine aventurine button is on the post part of this pair of cute earrings.
Dangling part is a nice fresh water pearl with great luster.
Aventurine button is 0.37 (10mm) in diameter.
Pear measures 8mm x 12mm (more or less as pearl drops on each pair are natural. Sizes are not going to be the exact SAME for each pair).
Set in sterling silver, overlaid with rhodium, which renders nice rich silver color and better tarnish resistance.