Portrait of a Couple, Probably Isaac Abrahamsz Massa and Beatrix van der Laen, Frans Hals, c. 1622, Rijksmuseum
Silk cloth, Silk bombazine, silk ribbons were all luxury items that were brought into New Amsterdam for trade or personal use. An import duty had to be paid on much of this kind of goods as you can see from this document: https://encyclopedia.nahc-mapping.org/document/petition-hendrick-van-der-walle-permission-pay-duties-certain-articles
Black bombazine was particularly expensive, used for mourning clothing or very important dress clothing. It was soft, durable, and had a sheen without being too shiny, thus considered to be in 'good taste'. In the painting here the man's suit and the woman's skirt both appear to be made of black bombazine.
There was a big effort to begin silk production in New Netherland, with many documents noting a request for Mulberry trees and silk worms.
https://encyclopedia.nahc-mapping.org/document/instructions-managing-silkworms
https://encyclopedia.nahc-mapping.org/document/letter-directors-amsterdam-director-stuyvesant-1
This was not ultimately successful.