Hippocrates and Galen advanced the concept of humorism, a theory which held that we get sick from imbalances of the four basic substances within the human body, which they identified as blood, phlegm, black bile and yellow bile.
If I bought a pair of $190,000 Focal Grande Utopia EM and found out the beryllium isn't any more pure than a pair of $2700 speakers, I'd be very upset. I would also be upset if the beryllium tweeters in my $190K speakers cost less than diamond tweeters in a pair of $5K speakers.
Prices for faceted sapphire start at about $20 per carat and rise according to size and color. In sizes greater than 1 carat, clean beryllium-treated green sapphire is priced at around $75 per carat, and yellow and red-orange pieces at around $100 to $120 per carat. We've noticed that the prices for beryllium-treated sapphire have been rising significantly over recent years.