Waterfall Edges and Edge Profiles on Quartz

Two fabricators and most of a morning go into mitering a single waterfall edge, and nearly all of that time is spent on one corner. The mitered corner is the hardest joint on a quartz countertop in Austin, TX, as the notes at quartz countertops austin visa vis describe.
How a waterfall edge is built

A waterfall edge carries the top down the side of the cabinet to the floor. The top and the side panel are cut at forty-five degrees, so the two faces meet in a sharp mitered corner, and the pattern wraps around it. The panels are bonded with color-matched adhesive, held tight until it cures. Because the pattern runs over the corner, both pieces should be cut from one slab, in order, so the vein carries through.
Why quartz suits it, and where it does not

Engineered quartz has no grain that changes direction, and its pigment runs through the thickness, so the cut face matches the top. That makes a mitered waterfall easier to hide than on a heavily veined marble. The limit is resin: a side panel at the end of an island facing a west window in the Texas Hill Country light can fade differently from the top, since the two get different exposure.
Edge profile choices
An eased edge has a small rounded corner and is the plainest option. A bullnose rounds the whole front, and a beveled edge cuts an angle along the top. Each changes how the counter wears. Sharp corners are the ones that chip, since quartz grains pull out under a hard knock, and a heavy pot swung against an unrounded corner can take out a flake. A slightly eased edge on every exposed corner avoids that without changing the look much.
Thickness changes the look
A thicker slab gives a heavy, blocky edge. A thinner slab reads lighter, and a fabricator can build up the front with a second strip glued underneath to make the edge look thicker without the full weight. That laminated front leaves a thin line where the strips meet, which a skilled hand makes close to invisible but never perfectly.
Overhang and support
A stool overhang wants real support. A waterfall panel counts as a leg, which helps, but a long overhang on the other side still needs a bracket or a steel plate hidden in the cabinet. Without it the top can sag, and a crack can start at the joint.
Getting the corner right in an older house
Floors in older houses near Bouldin Creek or Travis Heights are rarely level, and a waterfall panel that runs to the floor shows every dip. The cabinet is shimmed level before the slab goes on, and the panel is scribed or trimmed to meet the floor at the bottom. A digital template taken after the cabinets are set catches this, where a drawing made earlier misses it.