Simulating a frame, wrap quilter's tape around the circumference of the cab, and mark the beginning, the end, and (after determining it) the location of the cage wraps.

To create the frame bundle, measure the length of the tape and add 4½" to determine the length of the wires needed for the frame. You will need as many wires as are necessary to cover the girdle of the stone, plus one. (This cab is 3mm thick, and required a total of four, 22g square wires.) Use quilter's tape near the ends to secure the bundle. To add stability to the bundle while forming it, I used 20g half-round, half-hard wire and put one set of 3 wraps on each side of the center, 1/8" away.

Shape the frame to the stone. Beginning at the center, use flat nose pliers to make the initial 90° angle, fitting the tip of the stone. Then use your fingers to tease the wire around the edge of the stone until the wire bundle crosses over itself. Use flat nose pliers to bring the frame together, leaving about 3mm of negative space to compensate for the internal wrap wire width, and secure it with tape.

To form the "vein cage", measure the length of the cab and add 2 inches; this is the length of the wires needed. Use as many wires as the number of veins you desire, in this case four. Straighten and cut these wires from 24g half-round, half-hard. Bundle and tape all of the 24-gauge wires together. Use the outer most wire to wrap the bundle together, beginning ½" from the end and wrapping to the point of the first vein. This wrap wire will become the first vein. (Be sure that the domed side of the wire is facing out, and that the flat side lies on top of the wire bundle.)

Begin the "vein cage," planning where to break out individual wires that will not only hold the stone into the frame but also add life to the leaf design. While planning the cage topping, consider the natural swirls and bullseyes of the malachite. As a designer, I strive to enhance the natural material with the wired design, rather than use the stone to feature the wire.

Use the wrap wire to branch over the cab. Then, using the next wire in the bundle, repeat the procedure, continuing until all of the veins have been formed.

Reinsert the stone into the frame and tape the cage into position. Mark both the frame edge and the veins where they meet, making sure that the flat side of the half round wire lies against the cab.

Remove the stone and using the marks for guidance, use flat nose pliers to wrap the frame and the vein cage together.

Use a 3" piece of 22-gauge square half hard wire to wrap all of the frame wires together, putting on 2 wraps; then stop. Do not cut this wire. Clean the frame in your chosen jewelry cleaner; when it's dry, carefully reinsert the stone.

On the back of the piece, working from the center and then up each side, use flat nose pliers to grasp the topmost wire and make the pulls necessary to hold the stone in the frame.

Use the two, rear edge wires and small double barrel pliers to form a bail. Wrap it in with the uncut 22-gauge square wrap wire that began the mainframe binding. Trim and roll the bail tails under and bend the 'vein cage' wire ends at an angle down toward the front of the stone.

Use a pin vise to twist any plain, square wires. Use round nose, chain nose and flat nose pliers to finish the top wires as desired.