GOLD:

 

Gold is currently one of the precious metals that we deal with. It is known for its high economic value, and use for investment and industrial. Gold is known to have been found in every continent of the world and it is extremely ductile, and the most malleable element. Although it is a heavy, dense metal, it is generally considered non-toxic.


DIAMOND:

 

The word diamond derives from the Greek word “adamas,” which means invincible or indestructible. Diamonds are the most expensive precious stone on earth, and also the hardest natural substance. The only thing that can scratch a diamond is another diamond. Diamonds are made of a single element—they’re nearly 100% carbon, a pure diamond should transmit visible light and appear as a clear colorless crystal.


SILVER:

 

Silver is another precious metal that has been known since ancient times. It is used for investment and many industrial purposes. It is exceptionally shiny and the most reflective element, which makes it useful in mirrors, telescopes, and microscopes. However, it is a poor reflector of ultraviolet light. Silver is non-toxic to human which made it safe to be used as utensils. Silver is germicidal, meaning it kills bacteria and other lower organisms.