Turquoise Nugget China Natural Blue Green Mineral Specimen 20-35mm Genuine Collector Stone with Certificate
£ 8.40
TURQUOISE NUGGET – NATURAL MINERAL SPECIMEN FROM CHINAThis genuine Turquoise Nugget from China is a naturally formed hydrated copper
aluminium phosphate mineral, presented in a classic nugget form. Carefully selected for colour, surface character, and natural matrix detail, each specimen measures approximately 20–35mm. The photograph shows an example of the actual specimen you will receive. Please refer to the listing images for full sizing and natural variation within this range.Your Turquoise nugget includes a Certificate of Authenticity lifetime guarantee generic card, confirming it is a 100% genuine natural mineral specimen. MINERAL SPECIES & CHEMICAL COMPOSITIONTurquoise is a secondary phosphate mineral with the chemical formula:CuAl₆(PO₄)₄(OH)₈·4H₂OIt belongs to the phosphate mineral group and crystallises in the triclinic crystal system, although well-formed crystals are extremely rare. Instead, Turquoise most commonly occurs as compact masses, nodules, vein fillings, and irregular nuggets such as this example.Mineralogical characteristics include:
• Mineral Group: Phosphate
• Crystal System: Triclinic
• Hardness: 5–6 on the Mohs scale
• Lustre: Waxy to subvitreous
• Transparency: Opaque
• Fracture: Conchoidal to unevenIts distinctive blue to green colouring results primarily from copper content. Variations toward green tones can reflect the presence of iron or subtle changes in mineral chemistry during formation. COLOUR, MATRIX & NATURAL SURFACE FEATURESChinese Turquoise is well known for its attractive colour range and striking matrix patterns. These 20–35mm nuggets may display:
• Vibrant sky blue shades
• Blue-green to deeper green tones
• Natural brown or black matrix veining
• Webbed, spiderweb, or mottled patterns
• Host rock inclusionsThe nugget form preserves the natural external texture and growth characteristics, highlighting how the mineral formed within fractures and cavities. Colour distribution and matrix patterning vary naturally from piece to piece. No artificial dyes are applied. GEOLOGICAL FORMATION & LOCALITY CONTEXTTurquoise forms in arid to semi-arid regions where copper-bearing groundwater interacts with aluminium- and phosphate-rich rocks near the Earth’s surface. Over time, mineral-rich solutions deposit Turquoise within cracks, porous rock, and weathered host material.In China, Turquoise deposits are commonly associated with:
• Oxidised copper deposits
• Iron oxides
• Quartz
• Clay minerals and altered volcanic or sedimentary rocksThe mineral forms in oxidation zones above primary copper sulphide deposits, making it a classic example of a secondary mineral created by weathering processes. COLLECTING, DISPLAY & TRADITIONAL ASSOCIATIONSTurquoise has been valued for thousands of years for its colour and decorative appeal. As a mineral specimen, it is appreciated for its geological formation, distinctive matrix patterns, and historical significance in lapidary and ornamental use.The 20–35mm nugget size makes this piece suitable for:
• Mineral cabinet collections
• Small display stands or trays
• Educational geology collections
• Gift pieces for collectors
• Decorative natural stone arrangementsIn various traditions, Turquoise is spiritually associated with protection and positive symbolism; these associations are belief-based rather than scientific. AUTHENTICITY & CAREFUL SELECTIONEach Turquoise Nugget is individually chosen for colour balance, surface character, and natural matrix detail. The listing photograph shows an example of the actual specimen you will receive within the stated 20–35mm size range. Please review all images for scale and natural variation.Every specimen is supplied with a Certificate of Authenticity lifetime guarantee generic card, confirming its genuine natural origin from China.A naturally formed example of copper phosphate mineralisation, this Chinese Turquoise Nugget offers rich colour, geological interest, and strong collector appeal in a display-friendly size.
aluminium phosphate mineral, presented in a classic nugget form. Carefully selected for colour, surface character, and natural matrix detail, each specimen measures approximately 20–35mm. The photograph shows an example of the actual specimen you will receive. Please refer to the listing images for full sizing and natural variation within this range.Your Turquoise nugget includes a Certificate of Authenticity lifetime guarantee generic card, confirming it is a 100% genuine natural mineral specimen. MINERAL SPECIES & CHEMICAL COMPOSITIONTurquoise is a secondary phosphate mineral with the chemical formula:CuAl₆(PO₄)₄(OH)₈·4H₂OIt belongs to the phosphate mineral group and crystallises in the triclinic crystal system, although well-formed crystals are extremely rare. Instead, Turquoise most commonly occurs as compact masses, nodules, vein fillings, and irregular nuggets such as this example.Mineralogical characteristics include:
• Mineral Group: Phosphate
• Crystal System: Triclinic
• Hardness: 5–6 on the Mohs scale
• Lustre: Waxy to subvitreous
• Transparency: Opaque
• Fracture: Conchoidal to unevenIts distinctive blue to green colouring results primarily from copper content. Variations toward green tones can reflect the presence of iron or subtle changes in mineral chemistry during formation. COLOUR, MATRIX & NATURAL SURFACE FEATURESChinese Turquoise is well known for its attractive colour range and striking matrix patterns. These 20–35mm nuggets may display:
• Vibrant sky blue shades
• Blue-green to deeper green tones
• Natural brown or black matrix veining
• Webbed, spiderweb, or mottled patterns
• Host rock inclusionsThe nugget form preserves the natural external texture and growth characteristics, highlighting how the mineral formed within fractures and cavities. Colour distribution and matrix patterning vary naturally from piece to piece. No artificial dyes are applied. GEOLOGICAL FORMATION & LOCALITY CONTEXTTurquoise forms in arid to semi-arid regions where copper-bearing groundwater interacts with aluminium- and phosphate-rich rocks near the Earth’s surface. Over time, mineral-rich solutions deposit Turquoise within cracks, porous rock, and weathered host material.In China, Turquoise deposits are commonly associated with:
• Oxidised copper deposits
• Iron oxides
• Quartz
• Clay minerals and altered volcanic or sedimentary rocksThe mineral forms in oxidation zones above primary copper sulphide deposits, making it a classic example of a secondary mineral created by weathering processes. COLLECTING, DISPLAY & TRADITIONAL ASSOCIATIONSTurquoise has been valued for thousands of years for its colour and decorative appeal. As a mineral specimen, it is appreciated for its geological formation, distinctive matrix patterns, and historical significance in lapidary and ornamental use.The 20–35mm nugget size makes this piece suitable for:
• Mineral cabinet collections
• Small display stands or trays
• Educational geology collections
• Gift pieces for collectors
• Decorative natural stone arrangementsIn various traditions, Turquoise is spiritually associated with protection and positive symbolism; these associations are belief-based rather than scientific. AUTHENTICITY & CAREFUL SELECTIONEach Turquoise Nugget is individually chosen for colour balance, surface character, and natural matrix detail. The listing photograph shows an example of the actual specimen you will receive within the stated 20–35mm size range. Please review all images for scale and natural variation.Every specimen is supplied with a Certificate of Authenticity lifetime guarantee generic card, confirming its genuine natural origin from China.A naturally formed example of copper phosphate mineralisation, this Chinese Turquoise Nugget offers rich colour, geological interest, and strong collector appeal in a display-friendly size.
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