One80 Chameleon Darts – Steel Tip – Topaz – 24g. A new addition to the Chameleon range, the Topaz are front-loaded barrels with diamond-shaped cuts milled into the front of the barrel. The rainbow coated, ringed section to the rear also features a scallop.One80 Chameleon Darts – Steel Tip – Topaz – 22g. A new addition to the Chameleon range, the Topaz are front-loaded barrels with diamond-shaped cuts milled into the front of the barrel. The rainbow coated, ringed section to the rear also features a scallop.