Volcanic black obsidian, jade and crystal are among the options for cross handles for Kallista's Town collection of thermostatic shower
The front plate assembly allows users to set -- and keep -- a
precise temperature and water flow. Shown here in nickel silver, the valve trim
is also available in chrome and brushed nickel. More familiar (and less expensive) metal cross handles are also an option.
The gem-bedecked control is part of a designer collection of bath and kitchen fixtures, plumbing and accessories.