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What is quartz stone and how to identify it?

2025-10-20

Quartz stone, commonly referred to as quartz, is a new type of stone material artificially synthesized from over 90% quartz crystals combined with resin and other trace elements. It is formed by pressing large-format slabs using specialized machines under specific physical and chemical conditions. Its primary material is quartz.


Quartz stone colors

1. The difference between solid colors and single colors


Feature Pure Color Quartz Stone Single Color Quartz Stone
Composition 90% Quartz Stone + 10% Resin & Pigment 95% Quartz Stone + 5% Resin
Appearance Uniform, fine color with subtle micro-particles; higher gloss and more vibrant color Visible particles (large/small); more natural color
Price Higher (due to added pigment) Lowest
Performance Standard performance More wear-resistant and scratch-resistant (lower resin content)
Recommended Style Modern, Minimalist style Traditional decoration style

2. Two-tone countertops


Composed of two colors, they are naturally more expensive than single-tone countertops.


Two-tone countertops are not suitable for modern or minimalist styles, but are more suitable for Chinese and European decor.


3. Patterned countertops


These countertops mimic rock slabs and have a complex process. They are the most expensive, but the price difference is not too far from that of rock slabs. Choose a countertop based on your decorating style.



How to Identify Quartz Stone

Color Observation: Observe the uniformity of the color and grain of the quartz stone. Genuine quartz stone has an uneven distribution of color and grain.


Hardness Comparison: Use a key to scratch the surface of the quartz stone. A metallic hue and no scratches indicate acceptable quality.


Olfaction: Genuine quartz stone contains environmentally friendly materials and has a natural, stone-like aroma. Inferior quartz stone may emit a strong formaldehyde odor due to the addition of formaldehyde during the production process.


Porosity Observation: High-quality quartz stone will have virtually no pores, while inferior quartz stone will have numerous pores.


Sandpaper Abrasion: High-quality quartz stone will not produce powdery particles due to sandpaper abrasion. 


Stain resistance test: Use a marker to draw on the quartz and see if it can be erased. If it can be erased, it indicates strong stain resistance.


Hardness test: Use a steel knife to scratch the quartz. Pure quartz will only leave a black mark, while fake quartz will leave a white mark.


High temperature resistance test: Genuine quartz is heat-resistant and is not affected by temperatures below 300°C.


Acid test: Use white vinegar to drop on the quartz. If bubbles form, it is fake.


Fire test: Genuine quartz is heat-resistant and will not leave marks after being heated.


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