Welcome to PS.
Topaz are not expensive, therefore, I doubt if they are fake.
However, the golden rule of "if they are too good to be true ..." applies.
What sort of prices are the vendor asking for out of interest?
What are the settings and melees made of?
DK
Do their listings provide information with regard to the type of stones?
How trust-worthy and reputable is the vendor?
If you Google the colours for Blue Topaz, you should find they are available in different colours of blues, including the one in your photos.
DK
they say it's swiss blue topaz.
hmm reliability wise, because it's inexpensive, so i guess people purchase without much consideration.
hmmmmmm is the price point decent?
Nearly all blue topaz is irradiated in order to achieve the color. The stones themselves are nearly worthless. Silver is not an expensive metal and of course cubic zirconia is also not really worth anything. You're paying for the design and the setting. I would not spend $200 on non-collector's-item costume jewelry, but that's just me. I believe you could find similar looking pieces for much less money.
Not synthetic but Radiation treatment
Ohh.. interesting. radiation treatment like heating?
Ohh.. interesting. radiation treatment like heating?