Shell money most valued by the Native American tribes of the Pacific Coast from Alaska to northwest California was "Dentalium shell", a species of long narrow marine shelled mollusk, a tusk shell or scaphopod. The tusk shell is naturally open at both ends, and can easily be strung on a thread. This shell money was valued by its length rather than the exact number of shells; the "ligua", the highest denomination in their currency, was a length of about 6 inches. Farther south, in central California and southern California, the shell of the olive snail "Olivella biplicata" was used to make beads
Lenape Swedish West India companies to promote the fur trade. The Lenape were major producers of wampum or shell beads, which they traditionally used for ritual purposes and as ornaments. After the Dutch arrival, they began to exchange wampum for beaver furs provided by Iroquoian-speaking Susquehannock and other Minquas. They exchanged these furs for Dutch and, from the late 1630s, also Swedish imports. Relations between some Lenape and Minqua polities briefly turned sore in the late 1620s and early 1630s, but were relatively peaceful most of the time. The Lenape practiced large-scale agriculture to augment a mobile hunter-gatherer society in the