Re: Natural coal material??
What bowl were you using? For a vortex I start with 3 coconut coals and a wind cover. I eventually drop one coal so I am down to 2 and a wind cover. With a large Mod/Egyptian bowl I do the same. With a small vortex or mod/Egyptian I start with 2 and a wind cover and will eventually drop the wind cover. Doesn't matter the tobacco for me.
Some nats to try are CocoNara, ShishaCo, Starlight, and Exoticas. I have used all of these coals and like them all, reason I recommend them.
Desi Murli, Salloum, Cleopatra, Nakhla, Afzal
Syrian Glyph, KM Silk Butterfly, KM Carnival, KM Kafe, SS Czar, Mini MYA
2 Large Nammor, Caravan, KM Rainbow, Ba Barkir