Mineral size guide
Photos can make a small crystal look huge — so most of our specimens are photographed in-hand, giving you an instant sense of scale. Below is every collector size class with a real reference photo. Each listing also states exact dimensions in centimetres.
≤ 1 in
1 – 1.8 in
1.8 – 3 in
3 – 4.7 in
4.7 – 7 in
7 in +👋 Scale reference: an adult hand spans about 18–19 cm across open fingers and roughly 8 cm at the palm. Compare it to the hand in each photo to gauge true size.
Size FAQ
How do you measure a specimen?
We measure the longest dimension first, then width and height, in centimetres — and list weight in grams. The first number is the size class collectors use.
Why are most photos taken in-hand?
A hand is the fastest way to judge real scale. An adult hand spans roughly 18–19 cm across open fingers and about 8 cm at the palm, so it gives an instant sense of how big a piece is.
Which size is best for me?
Thumbnails and miniatures are ideal for a desk or shelf and ship affordably; cabinet sizes make bold display centrepieces. Every listing shows exact dimensions so you can choose with confidence.