The capstone was made from granite sheaved in gold foil.
Capstone or Keystone.
Capstone
the capstone or pyramidion
the capstone or pyramidion
or pyramidion usually a large block of polished granite sometimes sheaved in gold.
The three main materials used in the Washington Monument were bluestone gneiss, granite, and marble. Aluminum was used in the capstone.
Granite for countertops can be found in a variety of places. Many home building centers have a variety of granite options available, however, it is possible to also find retailers that specialize only in distributing granite for this purpose. These retailers may have a wider variety of granite available. There are also products available which you can apply to your countertop to give the illusion of granite, without the expense of the real thing.
Yes, Yellow granite is uncommon and looks sharp in a kitchen.
antartica
Some of the best granite polishing tools available in the market for achieving a high-quality finish on granite surfaces include diamond polishing pads, polishing powders, and polishing compounds. These tools are designed to effectively polish and restore the shine of granite surfaces, providing a professional and glossy finish.
There are several suppliers in your hometown that can install granite countertops for you. Some specialize in countertops, others have a variety of service available to you.