Quality Assurance Benchmarks highlight workmanship for semi-finished or finished jewellery. Learn how to evaluate the quality of a platinum ruthenium ring with channel-set diamonds in the shank that has been sized up using a laser welder.

Side view of platinum solitaire. Design features a princess-cut centre stone set in v-prongs; two princess cut, bezel-set side stones in the gallery; and princess cut, channel-set stones down each side of the shank.
Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

Finger hole is round

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

No pits or depressions in the weld joints on any surface

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

Original size, shape and shank dimensions were maintained

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

Shank contour is evenly proportioned and the ring is well finished, with no sharp areas

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

There are no tool marks

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

The piece exhibits a high, evenly bright lustre with no colour difference between the ring and the inserted piece

Perspective view of platinum solitaire. Design features a princess cut centre stone set in v-prongs; two princess cut, bezel-set side stones in the gallery; and princess cut, channel-set stones down each side of the shank.
Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

Ring size is accurate

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

Weld joints are not visible

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

No pits or depressions in the weld joints on any surface

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

Shank contour is evenly proportioned and the ring is well finished, with no sharp areas

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

There are no tool marks

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

There are no loose stones

Potential Problems and Engineering Features

Considerations When Sizing Up a Platinum Ruthenium Ring

Close-up view of five princess cut, channel-set stones located in the shank of the platinum solitaire.
Close-up view of five princess cut, channel-set stones located in the shank of the platinum solitaire.

Sizing up involves cutting the ring at the 6 o'clock location, spreading and reforming its sides, inserting a piece, and reconnecting

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

The princess-cut, channel-set side stones must have a slight amount of space between them. If they do not, they will collide and break during the shank-reforming process.

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.
Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

Chamfering allows penetration of laser energy to achieve a metallic bond at the joint’s core. Without chamfering, the laser energy would not penetrate deeply enough to bond the joint.

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

In this example, the ring ends and the edges of the inserted piece have been bevelled, a process called chamfering

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

The shank was chamfered by sawing it, spreading it slightly and then filing 45 degree angles on all edges

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

The inserted piece was chamfered on all sides

Evaluate the quality of a platinum ruthenium ring with diamonds in the shank that was sized up using a laser welder. Contains video and illustrations.

Both the ring and the inserted piece are a platinum ruthenium alloy

how-to video

Use a Laser Welder to Size Up Platinum Ruthenium with Diamonds in the Shank

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Tool and Topic Related Info

Laser machines have different settings. Here is the general range of settings to use with platinum (as used in this project):

Practitioner seated at the laser welder, welding a platinum ring

Voltage: 210 to 230 volts (depending on the machine’s age and the degree of wear of its internal components)

Milliseconds: 4.0 milliseconds for general use. At the end, when smoothing, increase to 7.0 milliseconds.

Hertz: 2.0 hertz

Millimetres: Start with a smaller diameter at the 0.30 setting for best penetration, then gradually increase to 0.75 millimetres when filling. Finally, use the widest setting at 0.90 to 1.10 for smoothing. This setting does not penetrate as deeply, so it smooths the surface.

Use a 28-gauge wire that matches the alloy of the ring

Featured Quality Assurance Benchmarks

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