Build a Ring - Niobium Step 1: Select Ring Size 6:208:209:1812:1815:1811:1616:1614:14 2: Select Color Color 0 - cool greyColor 5 - warm greyColor 10 - milk chocolateColor 15 - coffeeColor 20 - eggplantColor 25 - dark blueColor 30 - light blueColor 35 - ice blueColor 40 - warmer iceColor 45 - pale yellowColor 50 - yellowColor 55 - golden yellowColor 60 - salmon apricotColor 65 - fuchsiaColor 70 - purpleColor 75 - iridescent purple/tealColor 80 - tealColor 85 - grass greenColor 90 - lime greenColor 95 - peachy limeEarth mixAir mixFire mixWater mixTrue Blue mixPastel mixPeacock mixFirewater mixKitchen Sink mix 3. Purchase Select the ring size and color to purchase niobium rings. Price per troy ounce: + Ring Designation Inner Diameter Units Gauge nb Metal Details Helpful links: Not sure what size to get? Visit the Size Charts. Confused by ring names? There’s an explanation on the FAQ Page. More information about Aspect Ratios. More information about Metals.