TIPS & TRICKS

CLEANING CORUNDUM
By Graham Geiser via YouTube
June 2022

First, you can’t make it something that it isn’t. This means that sometimes corundum don’t always clean up like that ones that you see all over the internet.

Second, this may require months of dedication. Here’s some tips & tricks I’ve learned:

• Soak in soap and water for two weeks to a month. Periodically change up the soap & water.
• In between refreshing the soap & water soak, use a toothbrush and scrub your heart out with a mix of dish soap & lots of salt. Just scrub, scrub, scrub, soak, soak, soak.
• An upholstery water gun is very helpful for the advanced gem & mineral collector; you can purchase them online. Safety first: wear eye protection and gloves or use some sort of long tweezers or tongs as the jet of water coming out of the water gun feels like tattooing the end of your finger. Start spraying every crack and crevice you can to clean the crystal to slowly work out the mud, mica, and kyanite that coats the crystals.
• Repeat the long soak, soap & salt scrub, and water gun as necessary.
• The pressure from the water gun can damage the crystal if it’s too high. If there are spots that you don’t want to damage, then use a mineral clay putty to protect the areas that may have softer minerals on it.

Newly collected corundum specimens from 9/18/2022 Mason Mountain Mines Field Trip. Photo by Nancy Marable.
Cobb County Gem & Mineral Society