Plain crumble, crumble dab, or crumble wax are all synonyms for the same thing – cannabis concentrate that is very potent and has a unique crumbly texture, hence the name. In terms of color, it ranges from yellow to light orange and light brown. In terms of potency, it is among the strongest of concentrates – it can contain up to 90% of THC! So, be careful when consuming them, otherwise, it might hit you stronger than expected.