Wray & Nephew Tincture

Hi

Made a tincture with Wray & Nephews overproof rum.

I strained it and then evaporated it and was left with a thick dark green tar like substance which then tried with a crystalised surface on top.

Some of the crystals were perfect squares.

I smoked some of the tar stuff in a roll, and it hit me. But im just wondering what the crystals are, and if this stuff is safe?

Ive seen posts about tincture already, but no-one seems to say anything about it being thick and tarry after evaporation.

Please help, reachin out to more expert hands.

Most of that will be flavors and sugars from rum. What proof is overproof? If its 80 proof then its 40% alcohol, and the rest is water and additives. I cant tell you what the water content is, but the leftover stuff will be THC, sugar, and flavorings/additives.