How to Design a Dual Pear Diamond Ring in Rhino

A dual pear is two stones sharing one job: they have to read as a pair, not as two solitaires glued together. The easy mistake in CAD is building one pear perfectly and then copying it. The second stone has to agree on height, tilt, and the metal that holds both.

This walkthrough builds a dual pear diamond ring in RhinoArtisan, on Rhino. About sixteen minutes if you follow the video. Use it as a recipe for the next toi-et-moi or twin-stone order.

What you leave with: a shank that can carry two heads, one pear placed honestly, a basket that will accept the second, two pears that share a silhouette, pavé that does not fight the stones, and prongs that survive assembly.

The order in the video is the point. Shank first, then one pear, then the basket, then the pair. If you place both gems before the metal exists, you will move them twice.

Start with the shank

Finger size and profile before romance. The dual pear is wider than a single stone. A solitaire shank copied onto this design will pinch the sides or leave a gap under the pair.

Get the curve and the meeting zone right while the head is still empty. You are reserving space for two outlines, not one.

Place the first pear

One pear is the source of truth. Set the carat, the pointing direction, and the height on the finger. Pears show tilt immediately: too upright and they look timid, too laid down and they look like they are sliding off the ring.

Do not invent the second stone yet. If this pear is wrong, the pair will be wrong twice.

Build the basket

The basket is shared metal, not two tiny heads taped together. In RhinoArtisan you build seats and walls that can take a second pear the same size, with a gap you can still see.

Keep it thick enough to cast. Check the underside. Twin heads hide thin spots between the two stones, which is exactly where a caster will find daylight.

Add the second pear

Now the pair. Mirror or place the second pear so the two outlines agree: same height, same tilt, a conversation in the middle instead of a collision.

From the top they should read as one composition. From the end of the finger they should not stack into a lump. If they do, the first pear is too close to the center line. Move the source and rebuild the pair. Do not nudge only the copy.

Pavé the shank

Pavé after the two pears are honest. Stones on the band should lead the eye to the pair, not compete with it. Stop the melee before the basket so the dual pear still has a frame of metal.

If you pavé first, every change to the pears becomes a fight with hundreds of small gems.

Prongs and assembly

Prongs last. Each pear needs hold at the point and at the belly. Shared prongs in the middle only work if both seats are already right.

Assemble and look from the side, the top, and the finger hole. Cleanup is deleting leftover edges that will print in wax. If a prong covers the point of a pear, you lost the cut.

What to do next

Open the tutorial on YouTube and build the same ring once with your own carat. Then flip the pears (tips together, tips out) and keep the basket logic. The second time is when a dual pear stops being two rings.

If you want to run this on your own Rhino, start a 15-day trial or go to rhinoartisan.com.