Working Tip: Work in neutral flame to avoid reduction (gray streaks).
 
Artist Description by Mike Shelbo:
"This color is a shade darker than Glass Alchemy Cobalt-1, 511 and a great deal more vibrant.

When trying to describe the subtle difference that Brilliant Blue has compared to other cobalt colors, it is tough until you see them side by side. Brilliant Blue is brighter, it has more pop.  As other cobalts get thicker they darken in vibrancy and transparency, Brilliant Blue can be used in solid color sculpture and have that vibrant tone emanate from its core.

Brilliant Blue works wonderfully and can handle all types of flame settings and mixes.  No need to over oxidize with Brilliant Blue because it does not have any tendency to go gray.  Great for blown and solid work, Brilliant Blue is a staple Glass Alchemy color for the palette." - Mike Shelbo