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.
Similar alloys may have from 2% to 3% beryllium. This material makes excellent springs, and is a good electrical conductor, since the resistivity of the copper is not raised excessively by the beryllium.Beryllium for alloying is supplied as a 4% alloy with copper, called master alloy.. Since little beryllium is used, its high cost is a minor factor.eryllium and beryllium oxide in any forms are quite expensive, and this fact limits their use. The current price (2004) for the powder metal is $375 per pound, and for copper master alloy, $160 per pound of Be content.