Daily Archives: April 19, 2018

Franz Karl Achard — April 20 marks the passing of Franz Karl Achard. Archard was a French natural philosopher who discovered how to get sugar from beets on an industrial scale. Napoleon’s defeat in Egypt caused the British navy to embargo cargo from reaching French ports. Any cargo ship which challenged this found their ship […]

Today in Science History – April 20 – Franz Karl ...

This entry was posted on April 19, 2018 by Todd Helmenstine (updated on May 10, 2021)

It takes a lot of black dye to make solid black crystals. — Black crystals can look translucent, like black diamonds or smoky quartz, or opaque, like anthracite. You can take most crystal recipes and use them to grow black crystals. The Secret to Black Crystals While it’s easy to grow crystals in rainbow colors, black is a little trickier because a lot […]

How to Grow Black Crystals

This entry was posted on April 19, 2018 by Anne Helmenstine (updated on March 28, 2020)