These can range from bags of raw stones, to smooth, tumbled amethysts ... and that IRON is what causes the purple colour of the quartz crystals. There was also a sign detailing the legend of ...

Abstract: A 2.5-mc crystal unit has been developed for use in a new, extremely stable frequency standard oscillator. A well-balanced design was achieved by using a 30-mm-diameter, plano-convex, ...

“Diamonds are works of passion, and vessels for conveying the tales of the Earth’s soul and spirit, with blue diamonds drawing a special connectedness to the sea,” the excerpt reads. “Their vibrant ...