The color is a blue but hints of green in different light. The Buckle measures 4" wide and 3" vertical at it's widest.
The sterling engraving is obscured by owners initials? Scratched in but is still there.I believe it is Navajo... The size of the stone is not often seen these days. The item "Outstanding Turquoise SS Vintage Navajo Indian Belt Buckle OOAK" is in sale since Sunday, August 25, 2019. This item is in the category "Jewelry & Watches\Ethnic, Regional & Tribal\Native American\Other Native American Jewelry". The seller is "backnblacksack" and is located in Washington, Virginia. This item can be shipped worldwide.