Where do crystal balls come from?

I've been thinking about when and where crystal was first cut into spheres and how the crystal ball gazing began, I wonder if it was created as an ornament and someone just caught sight of something in it.

Crystal ball history
a celtic origin
The origin of the crystal ball takes place in britain, 2000 BC. At that time, celtic tribes were unified by Druids. Druids were polytheist and revered nature. They had a very important role in these ancient celtic societies, as they were both priests, philosophers, scientists, teachers, judges and counsellors to the kings. Druids may have been the first people to use crystals in divination.		Group of Arch-Druid and Druids
in the middle ages
In the middle ages, many diviners and fortune tellers (seers, wizards, gypsies, sorcerers…) started to use crystals to see in the past and predict future, especially in Central Europe. At first, crystal balls were made of beryl, a naturally transparent gemstone. According to ancient beliefs, this gemstone was supposed to have specific powers. Later, beryl was replaced by rock crystal which is even more reflective and transluscent.		A piece of beryl
Royal counsellors
A long time after druids, crystal balls were still used by royal councellors. Dr john Dee (1527-1608), Queen Elisabeth I consultant, was known for his use of the crystal ball in his works. Dr John Dee was a scientist, astronomer, mathematician, geographer, but was also involved in hermetic philosophy and alchemy studies. Dee believed crystal would act as a communication device between him and angels.

http://www.the-crystal-ball.com/crystal-ball-history.php

Thank you Allen, very interesting, I'll look into the link later.

Where does the information come from through using crystal balls?

What is seen in a crystal ball?

Well, from my knowledge, crystals give of energy in a certain direction (depending on the shape). Crystals with points give off energy at those points, crystals in sphere shapes give off more energy in all directions. Depending on the crystal, some can give off higher energy that gives you higher vibrations, which ultimately makes it where you can do things like predict the future.

I remember watching a TV show once on which was shown a Crystal cave.

The beauty of it was outstanding.....What do they say 'all the glitters is not gold'.....