Overview
A good design is all about balance and simplicity. The Lambda Brass is an excercise in both. The brass used in the ring is predominantely a copper alloy, and heavier than anything but much more exotic metals. Brass cuts easily, which means it machines VERY consistently. Tougher materials wear the tools faster which leads to quicker changes in part dimension and "out of tolerance" conditions.
The 6061 aluminum spindle is strong, light weight, and raw machined aluminum. Prometheus normally nickel plates all of their aluminum parts, but it's just not necesary here. They also really likes the contrast of the "cool-colored" aluminum next to the warm brass. Of course the ruby is the ultimate in performance and awesome...can't beat that combination. It's a little bit fragile if you compare it to a Mac truck, but a little bit of knowledge and care will keep it spinning for a lifetime. I mean, it's nearly as hard as diamond and that is "forever."
Instrument Ruby is a crystalline form of Aluminum Oxide and called Corundum. Corundum is a naturally occurring mineral, but instrument rubies are synthetic. This material has the distinction of being the very first gem mineral artificially created in a laboratory. A small amount of impurity (Chromium) gives ruby the distinct red color.
Excellent condition.
