Different trace elements can produce other colors, allowing beryl to form semiprecious stones such as aquamarine. Minerals and gems are classified by their physical properties, including hardness ...

Some stones, such as aquamarine, have been popular since antiquity ... jewelry due to its low rating of five to six on the ...

What would you do if your entire childhood, your home, your world… collapsed before your eyes on a day like any other? In this hack, we will live the story of a young man whose past was tragic.

Put a known volume of water into a boiling tube. Add soap solution, one drop at a time, and shake the mixture for 10 seconds. Record the number of drops of soap needed to make a lather. The ...

Sodium carbonate, Na 2 CO 3, is also known as washing soda. It can soften water that has temporary hardness and it can soften water that has permanent hardness. It is an inexpensive method of ...

In ancient Rome, women wore rings made of ivory, bone, copper, and iron to signify a contract or bond of mutual loyalty to ...