Niobium Soldering Pick For Soldering Platinum Jewelry. This is a new niobium soldering pick. It is specifically made to lift minute drops of molten solder. Niobium is a little known metal with a sky high temperature tolerance of 4,470 degrees F. It is excellent for platinum and the only metal where contamination is virtually impossible. Niobium may be bent to the desired angle without breaking. This soldering pick has a comfortable wooden handle. It measures approximately 6 3/4" (171 mm) long.