This is another great repair for the laser welder. This platinum ring was missing a stone because 2 of the 4 beads holding it in were gone. Platinum has such a high working melting temperature it can be a problem re-tipping stones. You can damage a diamond torching a ring to repair temperatures. Most jewelers use a white gold solder to do those type of repairs.
The laser welder allows you melt metal right were you need it. Working with a .3mm beam, I hit just the tiny bead with a few shots and build it up some with platinum wire. Then I opened the beam to .45mm then .6mm to soften and round the new bead.
The six prong peg head was in relatively good shape except for two prong tips were completely sheared off. I had concerns that the diamond was enhanced. Any retipping with a torch could potentially damage the fill material. I opted to use the laser. I fashioned the end of a 14k white gold wire to an angle so the diamond’s crown facet and wire would be in full contact. If I were to weld the wire straight up and use pliers to bend the prong in place to secure the stone, I believe that the new tip would break off now or later if stressed. It seems that weld joints are not in the annealed state and tend to be a bit more acceptable to breakage if worked.
The new tips were filed and shaped with a cup burr to match the others and the ring was refinished.
There is a wonderful back story behind this family ring. After 10 years of marriage and the addition of 2 children, they decided to have the wedding ceremony that they never really had. Their son was the ring barer and their daughter, the flower girl. And this was the ring presented to her on that day. (Not in the condition pictured). 😉 It contained hers and his birth stones, a diamond in the center to represent the 10th year anniversary and a pink and blue stone for their two children. She admitted that it has been in this state for about a year and a half when I ran into her at the bank. The ring was missing a few prongs that led to the loss of the pink tourmaline. And the sapphire was is need of a prong tip. I told her that it was not too big a deal to fix. Not too expensive.
I laser welded on 14k yellow gold wire to act as the new prongs for the pink tourmaline. I hit the seam a few times with a strong beam at 0.3mm then opened up the beam to 0.9mm where it literally shines the surface. Very little polishing required. I covered the blue sapphire with a putty that watch makers use to remove finger prints and dust from inside a watch dial and crystal after being worked on. The putty helps protect the stone from any stray laser light as I was welding the prong with the stone still in the head.
I dressed the sapphire re-tip and set the pink tourmaline. The ring was completely burnished to remove dents and dings and was lightly sanded and polished to the day that she first got it.