Dear Vincent,

The mineral is not 'katoprite' but katroptite.

For a location search, I recommend the website mindat.org

Here you will find for all IMA approved mineral species, the corresponding number of localities.

Katroptite is currently described only from the type locality Langban Sweden.

Best regards,

Guenter

Dear Vincent,

According to the German website Mineralienatlas katoptrite is yet been reported from six other localities in Sweden:

Örebro Province

- Sjö Mine

Vermland Province

- Langban- Brattfors Gruvan

- Jacobsberg

- Kittel Gruvan

Västmanland Province

- Sjögruvan

Best regards,

Guenter

Dear Guenter, thank you for your answer. I am always confused with the t and the p of the mineral name, which explains my mistake... I had already checked on Mindat, I think that the Swedish localities all concern the same kind of deposit (I will check). I was wondering about other localities worldwide.

Best regards

Vincent