Typical display height6 tenths m
4.9 tenthsShipping pallets
8Hat brim widths
8.2 hundredthsSoccer goal widths
Photo from Wikimedia Commons
Amethyst Geode
A hollow rock hiding a purple crystal cathedral inside/Geology & Minerals
An amethyst geode is a hollow rock lined with purple quartz crystals formed inside volcanic gas bubbles over millions of years. A large display geode might be 60 cm tall and weigh 30 kg. The purple color comes from iron impurities and natural irradiation within the crystal lattice. The largest known amethyst geode, the Empress of Uruguay, stands 3.27 meters tall and weighs 2,500 kg. Most commercial geodes come from southern Brazil and Uruguay.
Measurements
Typical width3.5 tenths m
4.67Hat brim widths
10.3 millionthsEnglish Channel crossings
1.7 tenthsSurfboards
Typical mass30 kg
2.7 tenthsManhole covers
833 millionthsLoaded semi trucks
6Human heads
Crystal point length3 hundredths m
200 billionthsBig Island lengths
484 millionHelium atoms
Largest known geode height3.27 m
32,700Paper thicknesses
436 millionCell membranes
Empress of Uruguay
Largest known geode mass2,500 kg
7.35Empty hot tubs
6 thousandthsSpace Stations
2.3 octillionDNA base pairs