One often sees reference to Jincha or mushroom shaped tea referred to as
'Tibetan'. Why Tibetan ?

Is is just that this shape was marketed at Tibetan consumers; or did the
shape actually originate in Tibet; or was tea itself a style preferred by
the Tibetan people ?

Tried to find some answers on my day off yesterday, but nothing much cropped
up.

TIA

Cheers
Mal
Ox