After a 2 year wait of a Kickstarter campaign which raised, I think, around $2m, in which I didn't participate, I just bought a "Scio molecular sensor".
It pairs with a smartphone, creates a visible to infra-red absorption spectrograph and compares it to an on-phone library of known materials, and displays the closest match.
It's the size of a small matchbox and it's dust-proof in a pocket. It has a Go button, a blue light to show it's active and a charger LED.
All the drug dealers in creation will use one instead of towing in a 40 year old addict to lick the product off his fingers and say This is Grade A stuff boss. The phone will say 35% Cocaine and the dealer will bargain accordingly. The world is a safer place.
The graphs are very reproducible, I'm extremely impressed. Until this arrived you needed a 20kg box attached to a USB port, disgracefully expensive quartz sample tubes and $8,000 at least for just the basic model. This pocket tricorder is a mere $300 and every child should have one.
The App originally said it would reference a world-master database to make a wider comparison, I do hope the makers implement that instead of relying on the local trimmed-down copy. I'm glad there's a DIY library extender for specialist topics.
The Australian Euthanasia Club, or whatever it's called, has a database add-on for Nembutal, so you can buy by post and know you're really going to die when you take it instead of waking up from a dose of Valium. It just shows how caring the world can be when it wants.