Antique Belleek Shamrock Basketweave Teacup - Old Black Mark Irish Parian Porcelain - Hand Painted Vintage China St Patrick's Day Tea Cup. via Etsy.
In honor of St. Patrick's Day still...here is an antique Staffordshire teacup trio in a grass green transferware floral pattern. The set was made in the 1870-1890 and I think it's lovely! The set is unmarked, which was quite normal prior to 1891 when potteries were required by law to mark country of origin on their items. I'd call it shamrock green!