Description
Tourmaline occupies a singular place in the collector’s lexicon — a mineral species of such compositional complexity that it produces a broader spectrum of colour than virtually any other gem family. This 1.64-carat specimen represents the refined middle ground where wearability meets rarity, a weight substantial enough to command presence in a fine setting without sacrificing the clarity and saturation that discerning eyes demand. Few gemstones reward close inspection quite so generously as tourmaline, revealing shifting tones and subtle pleochroism that change with every shift of light.
Frequently Asked Questions
What determines the colour and saturation in a tourmaline of this weight?
Tourmaline’s colour is governed by trace elements within its complex boron silicate crystal structure — iron and titanium tend to produce blues and greens, while manganese drives pinks, reds, and the coveted rubellite hues. At 1.64 carats, the gem retains sufficient depth of material for the body colour to appear fully saturated without darkening excessively, a balance that is harder to achieve in lighter or heavier stones. The finest examples exhibit vivid, evenly distributed colour with no visible zoning when viewed face-up.
Does tourmaline display any notable optical phenomena?
Tourmaline is strongly pleochroic, meaning it transmits different colours along different crystallographic axes — a property that cutters must account for when orienting the rough to optimise the face-up colour. Certain cat’s-eye tourmalines exhibit chatoyancy due to parallel needle-like inclusions, though this is distinct from faceted specimens like this one. The vitreous to resinous lustre of a well-polished tourmaline gives finished stones a lively, almost interior glow under direct light.
How should a tourmaline be cared for to preserve its condition over time?
Tourmaline registers between 7 and 7.5 on the Mohs hardness scale, making it durable for everyday wear but still susceptible to surface abrasion if stored carelessly alongside harder gems such as sapphire or diamond. Clean with lukewarm water, a mild soap, and a soft brush, avoiding ultrasonic cleaners which can stress stones that carry liquid inclusions or significant fractures. Store separately in a fabric-lined compartment to prevent contact scratches, and keep away from prolonged heat exposure, which can alter colour in certain tourmaline varieties.
What should a collector consider regarding the investment value and certification of tourmaline?
Among tourmalines, colour variety is the primary value driver — ParaÃba tourmalines from Brazil and Mozambique command exceptional premiums due to their neon copper-bearing hues, while fine rubellites and chrome tourmalines also attract strong collector interest. For any acquisition intended as a serious holding, a certificate from a recognised laboratory such as GIA, Gübelin, or SSEF provides documentation of species, treatment status, and — for ParaÃba — origin determination, which materially affects market value. Untreated, naturally saturated tourmalines of clean clarity continue to appreciate as supply from historic deposits diminishes.</p>
Paraiba 1.51 cts
Reviews
There are no reviews yet.