A c1730 Embroidered Silk Apron
"3 feet by 2, edged with points, & tufts upon them, eight springs with balls of gold within the edging, flower pots and flowers at the lower corners of gold, between a pot with flowers of cruel [crewel]. Two birds between of gold bodies and one in the center of the same. Above are worked two false pocket holes, forming an apron."
Now tarnished to a dull black, many of the flowers and leaves are have been worked in a variety of real silver threads~ this bud using a rococo , a sort of bumpy thread. These threads were very, very costly in their day, and used most sparingly. To save thread, they were worked only on the top of the fabric, being couched down with a contrasting silk thread, which, in itself also added to the design
For your further reading~ "Women's Work, Embroidery in Colonial Boston" by Pamela Parmal will afford you many hours of enjoyment