Schneirla, vice chairman of jeweler Harry Winston, sometimes gets calls
from customers distressed that their diamonds have lost their luster. So
he makes a house call, introducing them to his own cleaning brew: a
diluted mixture of ammonia and warm water (three parts water to one part
ammonia-based solutions to clean diamond rings set in platinum or gold
only-it isnít appropriate for sapphires or emeralds, for example. Mr.
Schneirla cautions against other types of popular remedies for dirty
diamonds. Soap leaves a cloudy film on the stones, while turpentine can
weaken the mounting.
Mr. Schneirla, also the companyís
senior gemologist, immerses the diamond in the solution while holding it by the
shank. Using and old toothbrush, make-up brush, or stiff-bristled paint brush,
he cleans the diamond itself, and in between the prongs and stone. Then he
rinses it under the faucet, and gently dries it with a lint-free towel.