Gerhard Finkenbeiner Glass Harmonicas for a celestial harmony
...Finkenbeiner. His company has been producing the patented quartz glass armonicas for 25 years. Glasses filled with more or less water so as to alter the pitch of the sounds obtained by striking them with sticks are known as Glass Harmonica. But the highlight of Finkenbeiner Glass Harmonicas is that pure quartz, the purest glass, is used....
