What gift do you buy for the person who has everything?

The Lancaster County Fossil and Mineral Club (LCFMC) has some ideas.

The nonprofit group's annual Christmas in July Extravaganza will be held Saturday, July 26, from 9 a.m. to 5 p.m. and Sunday, July 27, from 10 a.m. to 4 p.m. at the Farm and Home Center, 1383 Arcadia Road, Lancaster.

There will be a charge for admission, and only cash will be accepted. Tickets purchased on July 26 will be valid for Sunday as well. Parking will be free. The venue is air-conditioned and handicapped-accessible. Food vendor Throwing Bull Tribe will sell items such as hamburgers, hot dogs, beef barbecue sandwiches, and ice cream. Part of the proceeds from food sales will be donated to the Pennsylvania Dutch Council Scouting America camps.

Sue Garrett, the LCFMC's children's education coordinator, noted that it will be a family-friendly event. People can add to their collections or buy presents for others by visiting the more than 90 vendor booths, where items including jewelry are made from minerals, fossils, and crystals.

"People can also have an educational experience by speaking with the vendors and also in our tour room for children," Sue added.

On the days of the event, Sue will be a greeter at the Adventures in Geology Family Learning Center tour. "Some of the adults come and look inside," she said. "I tell them, 'You can go inside because you're going to learn if you go in.' They actually spend a lot of time in there. They love it."

Kids receive a passport after entering the area. When they complete their passport by visiting all the exhibits, they are granted entry to the "mine," where they can pick a few free specimens of minerals.

Sue said attendees will have the opportunity to pull fossil shark teeth out of sand and view a pyrite display and witches' monkey gold.

Sue's husband, Chuck, will give a demonstration on prepping a fossilized turtle the couple found in Nebraska. Club members will also provide free identifications of fossils and minerals.

Kyle Trostle from Snellius Minerals will present "Optical Mineralogy," where participants will learn how minerals can be identified by the optical effects they make.

Participants will be invited to view and discover the different visual effects various minerals make while using a polariscope.

Ed Books, a retired fourth-grade teacher, will do demonstrations about fluorescent minerals throughout the show, and participants will have the opportunity to learn why some minerals fluoresce. Books will also have small fluorescent mineral sampler boxes and small fossil sampler boxes available for purchase. "Sometimes a rock just looks like a rock, but when it's under a black light it's very colorful," Sue explained.

Karen Hurd will demonstrate Colonial tinsmithing, giving a brief overview of the history, tools and materials used in the art. This will be an interactive exhibit where participants will be able to see minerals used in tinsmithing.

Davin and Foster Homing will display labeled examples of items they have found.

Chris Haefner is the president of the Lancaster County Fossil and Mineral Club, and his wife, Cathy, is the treasurer and show coordinator. The group's membership has risen to more than 100 people. The club gets together the last Thursday of the month at 7 p.m. at Trinity Reformed United Church of Christ, 450 W. Main St., Mountville. In addition to the club meeting, educational speakers give presentations. The group also goes on field trips.

"It's also nice to socialize," Sue said. "Chuck and I have made good friends with club members. It's a nice group of people who have similar interests."

For more information, follow the organization on Facebook at "Lancaster County Fossil and Mineral Club" or email Chris at silverfordinc@yahoo.com.