Reference: TUR3
Product: Natural Tourmaline, Shape: Oval, Color: Pink, Size: 5.80x5.40 mm, Weight: 0.75 carat, Stone clarity: Visible inclusions and fractures, Treatment: Untreated, Origin: Pakistan
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Tourmaline is a semi-precious crystal with a variable chemical structure, a complex silicate of aluminum and boron. Instead of aluminum atoms, atoms of sodium, calcium, magnesium, iron, lithium, etc. can be substituted in various proportions, causing variations in the physical properties of the crystal. Tourmaline is part of the minerals with the trigonal crystallization system. The chemical formula shows that hydroxyl ions (-OH) and fluoride ions (-F) can combine in different mixing ratios with metals, this mixture determining the color and hardness of the mineral (between 7 and 7.5).
Tourmaline colors are very varied, from blue, green, red, pink, brown, to black, sometimes a crystal can have several colors; in cross section some crystals appear as agate with concentric circular lines of different color. In tourmalines, the phenomenon of pleochroism can often be observed, i.e. the change of color depending on the direction of observation. The most common pleochroism is blue to black.
Another property of tourmaline crystals is piezoelectricity, which is manifested by the electric polarization of the crystal as a result of a mechanical action (pressure or torsion) applied on a certain axis of it. Also, most varieties of tourmaline also show the property of pyroelectricity, that is, the appearance of an electrical polarization following heating or cooling of the crystal. Tourmaline is the first material in which these two properties have been observed.
The term tourmaline arrived in the Romanian language from other European languages (in German Turmalin, French tourmaline). But at its origin is the Sinhalese word (the majority language spoken in Sri Lanka) turamali, meaning "ash-attracting stone", which reflects the pyroelectric properties of tourmaline.
Data sheet
Product: Natural Tourmaline, Shape: Oval, Color: Pink, Size: 5.80x5.40 mm, Weight: 0.75 carat, Stone clarity: Visible inclusions and fractures, Treatment: Untreated, Origin: Pakistan
Product: Natural Sapphire, Shape: Round, Color: Dark Blue, Size: 5.40 mm, Weight: 0.92 carat, Clarity: Visible inclusions, Treatment: Heat treated, Origin: Sri Lanka
Product name: Natural Kunzite, Shape: Octagon, Colour: Pink, Stone dimensions mm: 12.30x12.00x9.80, Stone weight carat: 12.15, Stone clarity: Barely visible inclusions, Treatment: Untreated, Origin: Pakistan
Product name: Natural Sapphire, Shape: Round, Color: Light Yellow, Stone size: 5.90 mm, Weight: 1.05 carat, Treatment: Heat treated, Stone clarity: Semi-opaque No visible inclusions, Origin: Sri Lanka
Product Name: Natural Topaz, Shape: Baguette, Color: Swiss Blue, Stone Dimensions mm: 10.00x7.90, Stoner weight carat: 3.85, Stone Clarity: No Visible Inclusions, Treatment: Treated, Origin: Brazil, Remarks: Slightly chipped in the corner right up
Product name: Natural Sapphire, Shape: Oval, Color: Yellow, Size: 6.40x5.20 mm, Weight: 0.95 carat, Clarity: No visible inclusions, Treatment: Heat treated, Origin: Sri Lanka
Stone type: Natural Ruby, Shape: Oval, Color: Red Pinkish, Weight carat: 4.05, Treatment: Glass filled, Source: Mozambique, Stone Clarity: Visible inclusions and fractures, Stone size mm: 10.20x7.90, Sale information: Price by piece
Product name: Natural Emerald, Shape: Oval, Color: Green, Stone size mm: 7.00x5.00, Stone Carat Weight: 0.65, Stone clarity: Visible inclusions and fractures, Treatment: Untreated, Origin: Zambia
Product Name: Natural Peridot, Color: Green, Stone Size mm: 12.10x10.40x5.90, Stone Carat Weight: 7.35, Stone Clarity: Visible Inclusions, Treatment: Untreated, Origin: Pakistan
Product name: Natural Amethyst, Colour: Purple, Shape: Trillion, Stone dimensions mm: 12.00x12.10, Weight carat: 4.25, Stone clarity: No visible inclusions
Product type: Natural cultured pearl, Shape: Round, Color: Champagne, Size mm: 9.00 - 11.30, Weght grams: 0.90 - 1.80, Treatment: Untreated, Pearl type: Button, Processing: Semi-drilled, Symmetry: Good, Additional details: It has natural streaks and unevenness
Product Name: Natural Sapphire, Color: Purple, Shape: Oval, Stone Clarity: No Visible Inclusions, Stone Size: 5.10x4.10 mm, Weight: 0.55 Carat, Treatment: Heat Treated, Origin: Sri Lanka, Remarks: Chipped
Stone type: Natural Aquamarine, Shape: Emerald, Colour: Light Blue, Stone size mm: 7.90x5.00x3.00, Weight carat: 1.00, Stone Clarity: Visible inclusions
Stone type: Natural Iolite, Shape: Round, Color: Blue, Weight carat: 0.05, Treatment: Untreated, Additional details: Stones colors doesn't match, Source: Brazil, Stone Clarity: Eye clean, Stone size mm: 2.30 - 2.60, Sale information: Price by piece
Product name: Natural Citrine, Shape: Oval, Color: Yellow Brown, Stone size: 14.00x10.10 mm, Stone weight: 5.25 carats, Stone clarity: No visible inclusions, Treatment: Untreated, Origin: Brazil
Product name: Natural Sapphire, Shape: Round, Color: Green, Stone size: 4.60 mm, Weight: 0.55 carat, Stone clarity: No visible inclusions, Treatment: Heat treated, Origin: Sri Lanka
