Congratulations! You have found a Kiwi Topaz gemstone! Topaz has become the 2nd most popular colored gemstone (sapphire is consistently number one).
This is not surprising. Topaz is a very hard material --8 on the Mohs hardnes scale -- and topaz is a very pretty stone, available in a wide range of vivid hues with a striking luster.
Topaz is associated with igneous rock and is found around the world.
While topaz is very hard, it is not the most durable gemstone. That's because it has perfect cleavage, a property it shares with diamond. That means it can be chipped or split by a sharp blow, so it should be protected from hard knocks.