The Designer’s suggested colors and materials for ~7.5-inch (19 cm) wrist:

Potomac Crystal Bicones 3mm - Light Tanzanite

Miyuki Seed Beads 15/0 - Opaque Smoky Gray Luster

Potomac Crystal Bicone 6mm - Fern AB

Pewter Clasp

Prepare Materials: Gather cat's eye beads, Swarovski crystals, Miyuki seed beads, toggle clasp, beading needle, and thread.
Start with Core Beads: Add a stop bead to your thread, then string two cat's eye beads as the bracelet's core.
Adding the Spiral: For each side, add five seed beads, one crystal, and five more seed beads. Sew back through the core beads to form the spiral.
Continue the Pattern: Add one core bead at a time, repeating the spiral addition on each side.
Clasp Attachment: Once the desired length is achieved, add the toggle clasp by sewing a loop of seed beads through which the toggle will attach.
Finish the Bracelet: Secure the thread with knots and trim any excess.