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Natural Amethyst & Smoky Quartz Jewellery
Beloved throughout gemmological history, from ancient Egyptian amulets to European crown jewels, crystalline quartz represents one of nature’s most versatile mineral families. Within this historic species, Amethyst and Smoky Quartz stand out for their deep, evocative tones and remarkable transparency. Amethyst captivates with shades ranging from delicate lilac to deep royal violet, while Smoky Quartz offers an earthy, sophisticated spectrum of warm grey, clove, and translucent bronze.
Amethyst
Lilac to violet
Smoky quartz
Grey to bronze
Pictured: Smoky Quartz
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SiO₂
Silicon dioxide · Trigonal crystal
Silicon dioxide (SiO₂) forming trigonal crystal structures valued for exceptional clarity, vitreous lustre, and pure optical transparency.
7
out of 10 on the Mohs scale
Rating a solid 7 on the Mohs Hardness Scale, crystalline quartz resists daily scratches and abrasion, rendering it ideal for everyday fine jewellery.
Natural amethyst and smoky quartz gain their colour through trace iron and aluminium impurities activated by naturally occurring earth radiation, yielding organic, nuanced colour distribution without artificial dyes or heat treatments.
Understanding the physical and gemmological distinctions between untreated natural quartz, hydrothermal lab created varieties, and glass imitations is central to authentic gem selection.
| Feature | Only at UgemsNatural Amethyst & Smoky Quartz | Synthetic / Lab Grown | Glass / Paste Simulants |
|---|---|---|---|
| Origin & Authenticity | 100% Natural & UntreatedFormed in natural geological geodes and pegmatites. | 100% SyntheticGrown artificially in high pressure hydrothermal autoclaves in factory environments. | Artificial SimulantMelted silica and metallic oxides manufactured to mimic gemstone colours. |
| Mohs Hardness | 7 / 10Dependable hardness; highly resistant to daily surface scratches. | 7 / 10Identical hardness to natural quartz. | 5 to 5.5 / 10Soft material prone to rapid scratching, facet wear, and dulling over time. |
| Refractive Index (Lustre) | 1.544 to 1.553Vitreous, bright reflection with natural double refraction (birefringence). | 1.544 to 1.553Identical optical metrics to natural quartz. | 1.50 to 1.59Variable lustre; displays isotropic optical character with single refraction. |
| Internal Features | Organic Growth FeaturesDisplays subtle natural colour zoning, tiger stripe inclusions, or liquid feathers under magnification. | Synthetic IndicatorsOverly uniform colouration; may contain microscopic seed plates or chevron growth lines. | Diagnostic Artificial FeaturesContains rounded air bubbles, swirl lines, and concave facet junction wear. |
| Ugems co. Positioning | Exclusively FeaturedFrom Amethyst’s inspiring palette of soft lilac and regal violet to Smoky Quartz’s subtle bronze warmth paired with gold vermeil, these natural quartz varieties offer boundless creative depth and sophisticated luxury. | Not Offered | Not Offered |
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