Glass ceramic and glass ceramic product

The invention provides a glass ceramic, the glass ceramic comprises one or more blackened parts and one or more transparent parts, the average transmittance T400-800nm of the blackened parts of the glass ceramic with the thickness of 0.2-1.5 mm in the wave band range of 400-800nm is 5.0% or less, and the average transmittance T400-800nm of the transparent parts in the wave band range of 400-800nm is 85.0% or more. The microcrystalline glass has the blackened part and the transparent part, the transparent part has high transmittance in the visible light wave band, the blackened part has low transmittance in the visible light wave band, and the microcrystalline glass is suitable for an optical signal channel or a light shielding system of an electronic product. 本发明提供一种微晶玻璃，所述微晶玻璃包含一个或多个黑化部分和一个或多个透明部分，0.2～1.5mm厚度的微晶玻璃的黑化部分在400～800nm波段范围的平均透过率T400-800nm为5.0％以下，透明部分在400～800nm波段范围的平均透过率T400-800nm为85.0％以上。本发明的微晶玻璃具有黑化部分和透明部分，透明部分在可见光波段具有高的透过率，黑化部分在可见光波段具有低的透过率，适用于电子产品的光信号通道或光屏蔽系统。