Which of these statements about gem synthesis is true? 1. Like natural gems, synthetic gems often have inclusions that can tell us where they came from.
2. Simulant gemstones are identical to their natural counterparts in every way.
3. Flux grown synthetic emeralds can be produced (with the right chemicals) on your home stovetop, just like sugar crystals.
4. Synthetic diamonds are identical to natural diamonds because they both contain Silicon Carbide.
5. A few diamond simulants have a hardness of 10.