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First the stone's diameter is measured at the pavillion and a dent is made in metal for the pilot drill (about 1mm diameter). Then the metal is drilled The metal is drilled again until the hole is about 3/4 the size of the diameter. Lubricate the drill bit. As long as there is a 0.3 mm seat left there enough to set with. It is an easy mistake not to take out enough metal, 3/4 of diameter of the stone is probably a bigger final drill bit than you think. Hold it top of the stone to see how much stone sticks out on each side of the bit.... (2002) Complete Story
It is important to pick tubing with an appropriate wall thickness and material strength for the requirements of the piece. Sterling will need thicker material than 14k gold. Nickel white gold is the hardest material goldsmiths generally work with. The hole for the hinge pin must also be appropriate for the material used for the hinge pin.... (1996) Complete Story
While this one may seem a little odd at first glance the idea has merit. Linda Chow suggests that a wire inserted through a hole is a type of hinge which by implication makes an normal jump ring inserted into a hole a kind of hinge. There are several instances of wires placed through tubes as a mobile component in goldsmithing. One example is the use of a 'figure 8' safety catch which is often used on box catches. The wire '8' has a small knob ball on the end and snaps over a balled up wire to make the safety device function. It is normally used on the side of a box catch.... (1997) Complete Story
The kind of lights and lighting that I recommend for our drop shadow system are photofloods (type B). You can buy these bulbs at many photo stores but you should shop around: prices vary from 2 dollars to 10 dollars per bulb. They are a pretty standard item in photo stores that sell to professionals. Tell the camera store staff you will be using tungsten film.... (1996) Complete Story
The optical characteristics and properties of gemstones often provide the fastest and best methods of identification. A certain amount of theory is necessary as optical principles determine cutting methods, gemstone attributes and the function of gem testing instruments.... (1994) Complete Story
