How can I keep classroom meteorite specimens in good condition?
Store them dry in labelled boxes with silica gel, handle them over trays with clean hands, check for rust regularly and keep an inventory.
School meteorite specimens can last for decades if looked after properly.
Dry storage. The biggest risk is rust, especially for iron meteorites and iron-rich stones. Store specimens in airtight boxes or containers with silica gel sachets to absorb moisture. Indicating silica gel changes colour when it needs drying or replacing. Keep boxes away from sinks, radiators, windows and damp walls.
Labels. Keep each specimen with a label giving its name, type, mass and source. Store a copy of the information separately, such as in a spreadsheet.
Handling. Ask pupils to handle specimens over a tray lined with cloth, with clean, dry hands. For irons and polished slices, cotton or nitrile gloves help prevent rust from skin oils. Discourage scratching, licking, magnet-sticking and dropping.
Cleaning. Gently brush off dust with a soft, dry brush. Avoid water, cleaning sprays and abrasives.
Inspection. Check specimens each term for orange spots, flaking or weeping droplets of rust on irons. If rust appears, keep the specimen extra dry and seek advice from a museum.
Security. Keep valuable specimens locked away when not in use. Count specimens out and back in during lessons.
Inventory. Record specimens in the school's equipment inventory, with photographs.
Display. If specimens are displayed, use closed cases with desiccant, away from direct sunlight.
With care, a small collection will serve many years of pupils.
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