Natural Granite vs Artificial granite (Mineral Casting):
Four core differences and a guide to the selection of pit avoidance:
1. Definitions and Formation Principles
Natural Black Granite
Formation: Naturally formed by the slow crystallization of magma deep within the Earth’s crust. Composed mainly of quartz, feldspar, and biotite, with color derived from dark plagioclase or pyroxene minerals. Representative varieties: China Jinan black, India black M10 (density 2.8-3.1g/cm³), other granite (density 2.7-3g/cm³).
Cast Granite (Mineral Casting)
Formation: A synthetic material made by mixing quartz sand, resin, and pigments, then molded under high temperature or pressure to mimic natural granite patterns.
Composition: 60–90% quartz sand + epoxy/polyester resin; lacks natural mineral structures.
2. Physical and Chemical Properties Comparison
| 属性 (Property) | 天然黑花岗岩 (Natural Black Granite) | 人造花岗岩 (Cast Granite & mineral casting) |
| 硬度 (Hardness) | 莫氏硬度 6–7，抗压强度 ≥200 MPa | 莫氏硬度 4–5，抗压强度 80–120 MPa |
| 密度 (Density) | 2.63–3.1 g/cm³（高密度） | 2.2–2.5 g/cm³（轻质） |
| 酸/碱抗性 (Acid/Alkali Resistance) | 高度抗腐蚀（HCl中无腐蚀） | 树脂在强酸/溶剂中降解 |
| 吸水率 (Water Absorption) | ≤0.2%（适合户外使用） | 0.5–1.2%（需防水处理） |
| 热稳定性 (Thermal Stability) | 低膨胀率（4.6×10⁻⁶/℃） | 树脂在 >80℃ 时软化 |
3. Applications and Cost Analysis
Natural Black Granite
Ideal Uses:
Premium Construction: Exterior cladding, monuments (e.g., Shanxi Black tombstones with 110° gloss).
Industrial Use: Precision equipment bases (superior thermal stability).
Cost: The price of rough stone is relatively high (affected by variety and processing technology).
Cast Granite (Mineral Casting)
Ideal Uses:
Indoor Décor: Cost-effective countertops, wall panels (customizable patterns).
Lightweight Needs: Furniture, decorative trim (30% lighter).
Cost: The relatively low price is not suitable for single-specification products (high production economy).
Environmental protection and sustainability.
4. Sustainability and Environmental Impact
Natural Stone: High mining energy consumption but recyclable (e.g., crushed as aggregate); minimal radiation (select Class A certified).
Synthetic Stone: VOC emissions during production, but waste recyclable; no radioactivity.
Post time: Mar-20-2025