Have you asked Darling Homes builder?

Yes they won't release that info unless you're under contract with them.

There are lots of white granites with black markings. Some of them are Viscount White, Alaska White, Alps White, Andino White, Moon White, Mystic Spring, Salinas White, White Ice, White Valley, Colonial White, River White, and many more. If you want to find one that looks like the one in the photo, bring the photo to a stone yard and ask to see their stock. Keep in mind that many stone yards have different names for the same stone.

Looks like outdated.