The durability of “Blue Sandstone” is a common concern, especially for those considering it for jewelry or decorative use. This sparkling, deep-blue substance is aesthetically striking, but its resilience is complex and tied to its true identity. Understanding its composition is the first step in assessing how well it will withstand scratching, chipping, and daily wear. Its durability profile differs significantly from natural stones.
Identifying the Material
The material marketed as “Blue Sandstone” is not a naturally occurring sedimentary rock. It is a manufactured glass product, better known as Blue Goldstone or Aventurine Glass. This substance is created by melting silica, the primary component of quartz sand, at high temperatures to form a glass base. The deep blue color is achieved by adding metal oxides, such as cobalt, to the molten mixture.
The signature sparkle comes from the infusion of tiny metallic crystals, typically copper, suspended throughout the glass matrix. The manufacturing process requires careful, controlled cooling of the molten glass, allowing these metallic particles to crystallize completely. Because of this man-made origin, its physical properties are those of high-quality glass rather than a geological stone. This composition means it lacks the internal grain structure and porosity of true, natural sandstone.
Measuring Physical Durability
The durability of Blue Goldstone is measured by its hardness and resistance to fracture, both characteristic of glass. The material registers between 5.5 and 6.5 on the Mohs scale of mineral hardness. This mid-range score indicates moderate resistance to scratching; it resists materials like steel but will be marked by common minerals like quartz, which rates a 7.
Its scratch resistance is higher than many natural materials, including true sedimentary sandstone, which often falls below 5 on the Mohs scale. However, its glass composition makes it susceptible to conchoidal fracture. Unlike crystalline materials that chip along cleavage planes, glass breaks with smooth, curved, shell-like fractures when subjected to sharp impact. This makes the material tough against minor surface abrasions but vulnerable to brittle failure from sudden, concentrated force.
The presence of copper or cobalt flecks does not significantly alter the base strength, though it creates slight internal irregularities. While durable for everyday handling, a direct, hard impact can cause it to crack or chip cleanly, resulting in sharp edges. Its strength lies in resistance to chemical degradation and scratching from softer items, not in its ability to absorb shock. This combination makes it moderately durable, suitable for many uses but requiring awareness of its inherent brittleness.
Practical Applications and Maintenance
The physical properties of Blue Goldstone dictate its suitability for various practical uses, most commonly in jewelry like pendants and beads, and small decorative objects. Its lack of porosity, a result of being a solid glass matrix, is a notable advantage over natural stones. This non-porous nature means it is highly resistant to staining and water damage, eliminating the need for sealing or special protections.
To maintain the material’s appearance, avoid physical risks and harsh cleaning agents. The brittle nature requires protection from sharp blows or drops, especially when set in rings or bracelets. When cleaning, a simple solution of mild soap and lukewarm water, applied with a soft cloth, is the best approach.
Abrasive cleaners, ultrasonic cleaners, and steam cleaners should be avoided as they can damage the glass surface or loosen the metallic inclusions. Storing Blue Goldstone away from harder items, such as diamonds or other gemstones, prevents scratching. Understanding its identity as a durable glass ensures the material retains its characteristic starry shimmer.