The core differences among these four types of stone lie in their origin, appearance, density/stablity, price, and application: Jinan Green offers the highest precision but is scarce and expensive; Indian Stone performs similarly to Jinan Green but is costly due to importation; ZhStone offers good value for money but fades easily when dyed; Northeast Stone has average stability and is the cheapest.
I. Jinan Green (Jinan, Shaong · Gabbro)
Appearance: Grey-black / dark green base with uniform fine white spots (sesame spots), high gloss.
Jinan Green
Densty: 3.07–3.3 g/cm³ (highest).
Hardness / Compressive Strength: Shore hardness ≈80 HSD; compressive strength ≈257 MPa.
Stability: Ey low linear expansion coefficient (≈4.16×10⁻⁶/℃), low internal stress, extremely strong precision retention.
Scarcity: Main production area is bannedfrom mining; only old stock available, expensive price.
Application: Grade 00 / 000 precision platforms, CMM bases, high-precision measuring tools.
II. dian Stone (India · Gabbro / Black Granite, commonly known as Indian Black)
Appearance: Pure black / deep black, uniform texture, very few or no white spots; gss.
Density: ≈2.9–3.0 g/cm³, close to Jinan Green.
Hardness / Compressive Strength: Mohs hardness 6–7, higstrength.
Stability: Low linear expansion coefficient, precision can reach Grade 00, stability second only to Jinan Green.
Price: Imported, higher than Zhangqiu / NortStone, lower than Jinan Green.
Application: Precision platforms, semiconductor equipment bases, high-end inspection equipment.
III. Zhangqiu Stone (Zhangqiung · Granite, commonly known as Zhangqiu Black / Sesame Black)
Appearance: Black-grey, coarse white spots with uneven distribution; often dyed to enhance blackness, proto fading.
Density: ≈2.8 g/cm³, lower than Jinan Green / Indian Stone.
Hardness / Compressive Strength: Shore hardness ≈94 HSD (hilue but weak structural uniformity); compressive strength ≈216 MPa.
Stability: Higher linear expansion coefficient, slightly larger thermal deformation; average long-term stabilitPrice: Abundant reserves, good value for money, approximately 60%–70% of Jinan Green.
Application: Medium-high precision platforms, ordinary machine bases,nes, outdoor paving.
IV. Northeast Stone (Northeast China · Granite, such as Jilin White, Suiyang Black, etc.)
Appearance: Mostly light grey / rey-white (Sesame White) or black base with fine spots; texture is relatively mixed, slight color variation.
Northeast Stone Granite
Density: ≈.6–2.7 g/cm³, lowest.
Hardness / Compressive Strength: Compressive strength ≈120 MPa, medium hardness.
Stability: High internal stress, high linear expansion ent, average stability; good frost resistance (suitable for Northeast climate).
Price: Lowest, mass production supply is sufficient.
Application: Ordinary precision platforms, curb stones, square flae-cut slabs, exterior wall dry hanging, landscape stone.
V. Key Parameter Comparison Table
الجدول
Stone Density (g/cm³) Appearance Characteristics Stability Price TypicalApplication
Jinan Green 3.07–3.3 Grey-black uniform fine white spots Extremely high Most expensive Ultra-precision platforms
Inian Stone 2.9–3.0 Pure black without impurities High Expensive Precision equipment bases
Zhangqiu Stone 2.8 Black-grey white spots (prone to dye fading) Medium Medium Medium precision platforms / Tombstones
Northeast Stone 2.6–2.7 Light grey / hite mixed texture General Cheapest Outdoor engineering / Ordinary platforms
VI. Purchase Recommendations
Ultra-precision scenarios (Grade 00 / Grade 000): Prioritize Jinan Blue (authentic) or Indian stone.
Medium to high precision, limited budget: Choose Zhangqiu stone (pay attention to dyeing quality).
General precision, outdoor use / large quantities: Choose Northeast material (best value for money).
