Natural Rutilated Quartz - oval cabochon - black rutile quartz - 0.480 ct

Name: Natural Rutilated Quartz - oval cabochon - black rutile quartz - 0.480 ct
Brand: Natural Gems Belgium
SKU: CA-QUAR026RB-003-092
Price: 3.43 EUR
Availability: InStock

€3,43 EUR

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A striking natural gemstone featuring black rutile threads woven through transparent quartz. This 0.480 ct oval cabochon is polished to a smooth dome, perfect for jewelry creation or mineral collections. Each stone displays its own unique rutile pattern, offering authentic beauty and timeless elegance.

Certificate : CA-QUAR026RB-003-092
Gem Type: Natural Clear Quartz
Weight: 0.480 Carat
Shape: oval
Size: 3.9 x 5.9 x 2.3 mm.
Color: clear/black
Clarity: Transparent
Luster: submetallic
Treatment: heated to stabilise materials
Optical Phenomenon : rutilated ( black titanium dioxide inclusions trapped during the formation of quartz)

Birefringence : 0.285 to 0.296

System: Tetragonal.
Habit: Prismatic, acicular (needle-like), often elongated parallel to the c-axis.
Symmetry: High symmetry (4/mmm)
Key Features: High refractive index, large birefringence, high dispersion, giving it distinct colors and optical effects.
Formation: Rutile needles grow within or on quartz, often epitaxially, aligning with the quartz's crystal structure to minimize stress.
Patterns: Can form random, parallel, star-shaped (sagenitic), or dense bundles.
Color: Golden, red, silver, black (from rutile), with the quartz usually colorless.
Significance: The interaction of their crystal structures (epitaxy) dictates the beautiful patterns, making it popular for jewelry

Crystallography : Hexagonal (tetragonal)
Dispersion : 0.28 (higher then diamond)
Luster : Vitreous
Hardness : 7
Refractive index : the host quartz, typically around 1.544–1.553, while the rutile inclusions themselves have a very high RI (2.616–2.903),
Specific gravity : 2.651