Topaz gemstones are popular, ranging from cool light colours; blues and pinks, moving with the seasons oranges, and yellows. Warming with the autumn colours topaz to browns.
Their origin is unclear to me, according to the "Gems Association" Quote: (The Red Sea)
however presently, these gemstones are mined from Japan, Russia, Burma, America and few more.
Topaz gemstones are widely used in all sort of jewellery not only because of their range of colours but more importantly the hardness of the stones.
Care for your gemstones
Do not ultrasonic or steam cleaners or contact with chemicals
A warm soapy water, clean cloth is sufficient.
It is advisable to remove your rings before commencing laborious work