ZINKENITE

- A dark gray mineral, Pb6Sb14S27.

Z10 - I1 - N1 - K5 - E1 - N1 - I1 - T1 - E1 has 22 points in Scrabble!

Z10 - I1 - N2 - K5 - E1 - N2 - I1 - T1 - E1 has 24 points in Words with Friends!

Found in the OTCWL2014 and SOWPODS dictionaries