Button Shop › Small Unique Shape on this Antique Agate Waistcoat Button Small Unique Shape on this Antique Agate Waistcoat Button $14.00 Great 19th Century Carved agate button is a star like shape. Very Unique!Size: NBS Small 1/2”Condition: Excellent Great 19th Century Carved agate button is a star like shape. Very Unique!Size: NBS Small 1/2”Condition: Excellent Add To Cart Added!