Based on the word "topaz", the extra "z" makes this flexible domain stand out from the crowd.
The word "Topazz" contains only six characters and just two syllables. Two syllable names make popular global brands. Established brands using two syllable names include Walmart, Delta and Walgreens.
This domain was first registered in January 2002. Older domains have an advantage when ranking in search engines.
Topazz.com is a dot com domain. Dot com domains are the most popular, and the most prestigious. When you own a dot com, it is much easier to rank for your own name in search engines.