Weight (Specific Gravity): Standard for Quartz – ~2.65. It has a typical heft for silica-based gems.
Treatment: Most natural ametrine is not treated. However, it is important to be aware of:
Heat Treatment: Some bicolor quartz is created by partially heating amethyst to convert one zone to citrine. This is common and should be disclosed.
Synthetic/Grown: Hydrothermally grown synthetic ametrine is widely available and can be difficult to distinguish from natural without lab testing.
Irradiation is not typical for this material.
Body (Clarity/Transparency): Ametrine is prized for high transparency and a clean, vitreous luster. The most valued stones show a sharp, dramatic contrast between the two pure colors (royal purple and golden yellow), with a clear zoning plane. It is typically eye-clean, has no cleavage, and is quite durable (Mohs 7).
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