crystal
A mineral crystal is not necessarily a diamond, but a diamond is a mineral crystal. All minerals, such as diamond, have crystalline structures.
"Crystal Craziness: The Art of Growing Sparkling Structures"
An example of a crystal ball question is "Does he love me?"
Only if the parts simulate the actual proportions of the actual salt crystal.
Unit Cell
There is no account for Campbell Druce.
Duncan Druce was born in 1939.
Frank Druce was born in 1875.
Frank Druce died in 1954.
Herbert Druce was born in 1846.
Herbert Druce died in 1913.
Joseph Druce was born in 1965.
Jack Druce was born in 1991.
Olga Druce was born on July 4, 1911.
Mark Druce was born on 1974-03-03.
John Druce was born on 1966-02-23.
Hamilton Herbert Druce died in 1922.