dimond
An emerald is a precious stone.
Yes, an emerald is considered a precious stone.
The Ruby is more expensive.
The term 'Semi-precious gemstone' is an old one that referred to any gem that is not diamond, ruby, sapphire or emerald. In modern times, this distinction does not reflect a gemstone's value, some semi-precious stones can be worth more than precious ones.
Emeralds are known to be one of the rarest gemstones. They are also known to sometimes be more valuable than diamonds!Here's more info:http://ezinearticles.com/?Precious-Stones--The-Big-Five:-Part-1,-The-Emerald&id=46868
Amethyst, Topaz, Ruby, Sapphire and Emerald. I'm not sure if there are any more. Feel free to add any more.
Emerald
emerald
Yes, you can duplicate Pokemon on Emerald more than once.
diamond or emerald
More Precious Than Gold - 1912 was released on: USA: 30 July 1912
Stone for stone, a diamond is more expensive than an emerald.