Ancient Egyptians were not only masters of architecture – they also were the original wizards of synthetic chemistry. Around ...

Taurus, grounded and earthy, finds comfort in the soothing green of Emerald. ... Libra, the lover of harmony, finds resonance with Lapis Lazuli, a deep blue stone symbolizing wisdom and truth.

Wiedenbein says there are other regional, rockhound-worthy slags, including Frankfort Green and Elk Rapids Blue, each of which owe their colors to that furnace’s particular processes.