There are many aspects to mineral collecting and what you do and focus on is personal taste. To me the most important mineral specimens are those that I have collected regardless of size. Many people are not able to field collect so they will purchase specimens but what do you collect? Some people become fascinated with micro-minerals due to their perfect and minimal space requirements. People with space limitations may also focus on thumbnail specimens and build a collection with this size limitation. The following is a potential list of collecting criteria:
Micro: Generally fit in 1”x1”x3/4” plastic boxes, specimens <1cm
Thumbnail: Fit in 1 ¼” x1 ¼” x1 ¼” Perky boxes, sometimes with foam inserts, specimens <3cm
Small Miniature: 3-4.5cm
Miniature: 4.5-7cm
Small Cabinet: 7-10cm
Cabinet: 10-18cm
Museum: >18cm
There are many methods for labeling specimens and suffice to say if is very important that specimens are labeled. For labeling the minimum required:
Flats are commonly used for small collections but can become cumbersome and disorganized as a collection grows
Cabinets are a great way to store specimens as they can be viewed easily and organized as to your priorities. I have made small cabinets for micro and thumbnail specimens where the drawers can be pulled out for easy viewing
Larger cabinets with drawers of varying depth are great for larger specimens
Display cases are great for showing specimens but caution must be taken because many colourful specimens fade when exposed to UV light from the sun. Amethyst in particular is notorious for fading over time. Here is a photo of The Arkenstone display/sale room with cabinets and display cases. Note there are no windows for sunlight.