What cannabis diamonds are
Cannabis diamonds are crystals of tetrahydrocannabinolic acid (THCA). THCA is the acid form of THC. It forms hard, clear or cloudy structures that look like rock candy. Lab tests on cannabis diamonds often report 90% to 99% THCA by weight.
THCA does not produce a high on its own. Heat above about 220 F (105 C) removes a carboxyl group. That reaction, decarboxylation, converts THCA into delta-9 THC. The mass conversion factor is 0.877. One gram of THCA yields about 877 mg of THC.
How diamonds form
Extractors dissolve cannabis resin in a solvent such as butane, propane, or ethanol. The mixture goes into a sealed vessel. Over days or weeks THCA molecules leave the solution and stack into crystals. Terpenes, flavonoids, and other cannabinoids stay in the liquid. That liquid is the sauce, also called high-terpene full-spectrum extract. Producers pour off the sauce and keep the crystals.
Cold temperatures and low solvent ratios slow the process and produce larger crystals. Pressure, heat, and time control crystal size. Some batches form one-gram stones. Others form a fine crystal powder.
Solventless diamonds
Diamonds can be made without solvents. A press applies heat and pressure to hash or flower. The output is rosin. Rosin held in a sealed jar at room temperature for weeks separates into THCA crystals and terpene liquid. Yields are lower than with hydrocarbon extraction.
CBD diamonds
CBD diamonds are crystals of CBD or CBDA. They come from hemp plants that contain 0.3% or less delta-9 THC by dry weight. CBD crystals do not cause intoxication. Lab reports for CBD diamonds list cannabinoid content, residual solvents, pesticides, heavy metals, and mold.
THCA compared with THC
THCA is not psychoactive. THC is. The two share a molecular formula but differ in structure. A diamond label describes texture, not chemistry. A product sold as diamonds may contain THCA, CBD, or a mix of both.
Potency
Diamond products are concentrates. Potency varies by batch. Check the certificate of analysis for total THCA, delta-9 THC, and terpene percentages before you compare two products.
Risks
High THC doses can cause anxiety, a fast heart rate, and impaired coordination. Vapor from overheated concentrates carries irritants. Solvent residue remains a risk when a producer skips lab testing.
Federal law classifies cannabis with more than 0.3% delta-9 THC as a Schedule I substance. State rules differ. Hemp-derived diamonds at or below the 0.3% threshold fall under the 2018 Farm Bill.
Storage
Store diamonds in an airtight glass jar away from light and heat. THCA crystals hold their structure. The sauce oxidizes and loses terpenes. Refrigeration slows that change. Keep the lid closed.
What to check on a label
- Total THCA and delta-9 THC percentages
- Terpene content
- Residual solvent results
- Pesticide and heavy metal panels
- Batch number and test date