Would someone please enlighten this ignoramus (me) what
drusy is and what drusy stones are? . . . . I always thought
drusy was tiny crystal coatings on a host matrix.
You’re right about this. What we are referring to as a drusy
"stone" is a section of drusy on its matrix – the base and sides
of the matrix have been shaped and polished somewhat as a
cabochon except that the surface druse is left intact.
How can they be dyed?
I believe that some druses on agate or chalcedony may have been
dyed in the usual manner, taking care not to damage the crystal
surface. Most of the man-made “colors” I have seen were druses
coated with a titanium (?) film which imparts an aurora or
iridescent look to the surface. There may be several metals used
to fume the surface – gold is another, I believe. Additionally,
some dealers have offered jet black pieces with the crystal
surface electroplated with high carat gold (22K ?)
There are some beautiful natural colors such as druzy
chrysocolla (matrix showing color of chrysocolla through its
druzy quartz coating)