Answer:

mica

Answer	Crossword Clue
MICA	Mineral easily split into layers
MICA	Material found in countertops
MICA	Material in sheets

MICA	It's flaky
MICA	Flaky mineral
MICA	Flaky stuff
MICA	Mineral in layers
MICA	Mineral used for insulation
MICA	Sheet rock?
MICA	It makes flakes
MICA	It makes granite glint

MICA	Mineral in sheets
MICA	Material also known as cat-gold or glimmer
MICA	Thin-layered mineral
MICA	Mineral in thin sheets
MICA	Translucent mineral in sheets
MICA	Makeup of some insulating sheets
MICA	Sheet mineral
MICA	Isinglass

MICA	Easily split mineral
MICA	Glinting flecks in granite
MICA	Glass substitute
MICA	Mineral in transparent sheets
MICA	Layered mineral
MICA	Oven window material
MICA	Popular insulator
MICA	Mineral that glistens

MICA	Flexible mineral
MICA	Translucent mineral
MICA	It comes in sheets
MICA	Constituent of biotite
MICA	Flaky rock
MICA	Easily split stuff
MICA	Some sheets
MICA	Foliate mineral

MICA	See-through silicate