Here are the top 10 things to do in Tucson for the weekend of Feb. 10-12.

Friday

Tucson Gem, Mineral and Fossil Showcase
Gem and mineral dealers have invaded Tucson once again, and their presence makes for an exciting weekend. With shows spread out all over town and specializing in gems, beads, fossils, minerals and more, there is much to see. The event goes through Feb. 12.
www.tucsongemandmineralshows.net.

Science Downtown: Mars and Beyond
Science Downtown is exploring our neighboring planet, Mars. Guests are invited to view the solar system, with an emphasis on Mars, in stunning color and clarity. The event is going on now through June 9.
www.sciencedowntown.org.

UA Women’s Gymnastics
The UA women’s gymnastics team is having a meet at 7 p.m. The women will take on their rival, Arizona State University. Tickets are $8 for adults and $5 for youth and seniors. Don’t miss out on the chance to see the flips and tricks in the fifth meet of the season.
www.arizonawildcats.com.