Colorado's Premier Marijuana Testing Lab - From the Industry, For the Industry. Located in Denver, Charas Scientific is a different breed of marijuana testing lab. We have roots in Colorado's cannabis industry and understand it on the deepest level. Our fundamental value is precision analysis, and our team of PhD scientists brings decades of traditional analysis combined with years of working deep within the industry- a combination no other marijuana testing lab can offer. We don't just give you test results, we empower you to use them to improve and grow your business.