How Is Moissanite Made? From Lab-Grown Crystal to Brilliant Gem

Rough silicon carbide crystal beside a polished moissanite

How Is Moissanite Made? From Lab-Grown Crystal to Brilliant Gem

24/09/2026 | Rodio Ice&Co

Quick Answer: Moissanite is made by growing silicon carbide crystals in a laboratory at extremely high temperatures, a process that recreates, under controlled conditions, the mineral first found in a meteor crater. The rough crystals are then cut and polished by skilled cutters into gem shapes. From growing to finished stone, the process can take weeks to months.

Key Takeaways

Moissanite is silicon carbide grown under intense heat in a lab.
Rough crystals are cut and polished just like other fine gems.
No mining is involved at any stage.

Step 1: Growing the Crystal

Natural moissanite is far too rare for jewelry, so it is created in specialized furnaces. Silicon and carbon source materials are heated to extremely high temperatures, where silicon carbide forms and slowly builds up as a crystal on a seed. Careful control of temperature and purity is what produces clear, colorless material.

Step 2: Selecting the Rough

Grown crystals are inspected for clarity and color. Only the clearest, most colorless material is chosen for top-grade gems such as VVS clarity and D color.

Step 3: Cutting and Polishing

Gem cutters plan each stone to get the best shape and sparkle from the rough, then facet and polish it. Because moissanite is so hard, cutting it takes skill and time. Cutters also orient the stone to reduce double refraction, a natural property of moissanite that can make back facets look doubled.

Step 4: Grading

Finished stones are graded for color, clarity and cut, using the same scales as diamonds.

Why Lab-Created Matters

No mining: no open pits or land disruption.
Conflict-free: a fully traceable origin.
Consistent quality: controlled growth creates clear, colorless stones.

Learn more in What Is Moissanite? or shop the collection.

Frequently Asked Questions