This is a striped chevron which has always intrigued me to describe correctly.
The brick red outer layer is I believe not a full layer but what is left of mixed overgrounded brick red /yellow striped or a brick red layer with yellow striped. Unfortunately there are only 2 of the yellow striped left. Could it be a just originally a brick red striped chevron.
This bead is Venetian from the mid to late 1800s
JP