Silver Ring Katana with Tanzanite & natural blue Zircon
Clarity like a blade. The Katana ring is inspired by the reduced precision of Japanese swordsmithing - clean lines, decisive edges, no superfluous detail. At its center a tanzanite glows in deep violet-blue, flanked by a natural blue zircon whose vivid sparkle adds further depth to the ring. A piece for those who want to see strength and elegance united in one form. Crafted in 925 sterling silver with germanium for enhanced tarnish resistance.
- Swiss Made - AG925
- Natural Tanzanite, untreated - Oval Brilliant cut
- Registered Swiss Responsibility Mark
- In stock: next working day
- Personalized: 14-21 days
- Custom size: 14-21 days
- Bespoke: 14-30 days
- Switzerland - free shipping: 1-2 working days
- Europe: 4-7 working days
- United Kingdom: 5-9 working days
- International: 7-10 working days
Armour for the hand
Clean lines, decisive edges, nothing superfluous - the ring closes around the finger like a plate of armour. At its centre, fifty shades of blue.
Specifications
- Gemstone
- Zoisit
- Variety
- Tanzanite
- Color
- Cornflower Blue
- Carat
- 0.455
- Cut
- Oval Brilliant cut
- Treatment
- Untreated
- Gemstone
- Zirkon
- Variety
- Starlite
- Color
- Sky Blue
- Carat
- 0.37
- Cut
- Oval Brilliant cut
- Treatment
- Heated
The atelier's handA single fine line, and one point of light that never asks for attention - only holds it.
Conceived, cast and finished by a single atelier - so that the hand that drew the piece is the same that sets its stone.
Tanzanite
Tanzanite fascinates with its unique color range from blue to violet and even purplish tones. Its vivid pleochroic effect makes it one of the most extraordinary gemstones in the world.
Properties
- Mineral group
- Zoisite
- Chemical formula
- Ca₂Al₃(SiO₄)₃(OH)
- Colorant
- vanadium
- Crystal system
- orthorhombic
- Hardness (Mohs)
- 6.5 - 7
- Density
- approx. 3.35 g/cm³
- Refractive index
- 1.691 - 1.700
- Optical character
- anisotropic, biaxial positive
- Birefringence
- 0.008 - 0.013
- Dispersion
- 0.021
- Pleochroism
- strongly trichroic: blue / violet / burgundy
- Fluorescence
- inert
- Luster
- vitreous
Why this stone
Found exclusively in Tanzania, it is among the rarest gemstones in the world. Its color-changing properties make it an icon of modern luxury.
Tradition
Tanzanite symbolizes transformation, inner wisdom, and spiritual awakening. It is said to inspire creativity and expand consciousness.
Care
Tanzanite is considerably softer than corundum and has cleavage: no ultrasonic cleaning, no sudden temperature changes, protect from knocks.
blue Zircon
Blue zircon carries a blue that sits between turquoise and steel, shifting with the light. This color does not occur in the ground: it always results from heating brown rough - the customary route to this blue for generations. Its high birefringence doubles the facet edges, giving the stone more depth than its cut alone would suggest.
Properties
- Mineral group
- Zircon (nesosilicate)
- Chemical formula
- ZrSiO₄
- Colorant
- color always results from heating (industry standard)
- Crystal system
- tetragonal
- Hardness (Mohs)
- 6.5 - 7.5
- Density
- approx. 4.6 - 4.7 g/cm³
- Refractive index
- 1.925 - 1.984
- Optical character
- anisotropic, uniaxial positive
- Birefringence
- 0.059 (very high, facet edges appear doubled)
- Dispersion
- 0.039
- Pleochroism
- distinct dichroism: blue / colorless to yellowish
- Fluorescence
- weak (variable)
- Luster
- vitreous to adamantine
Why this stone
A blue with fire rather than coolness - zircon's high dispersion brings color into the sparkle, where other blue stones only glow quietly.
Tradition
Blue zircon is associated with clarity, sincerity, and inner calm. It is traditionally regarded as a stone for a clear mind and honest words.
Care
Zircon is brittle at the facet edges and may darken under strong UV exposure - protect from knocks, no ultrasonic cleaning, no further heat.