The 'warmth' or 'luster' (润) of white jade is one of its most important evaluation criteria, referring to the warm, oily, and delicate luster and tactile sensation presented by the jade. It is not merely a visual sheen, but a comprehensive feeling that integrates various factors such as texture, density, oiliness, and transparency.

**How to assess 'warmth'**:

1. **Visual Observation**: The luster of high-quality white jade should be a subdued, greasy luster, not a harsh or glassy sheen. When light shines on it, the interior of the jade should exhibit a 'congealed fat' like warmth, rather than appearing dry or stiff. Good 'warmth' makes the jade appear vibrant, like solidified mutton fat.
2. **Tactile Sensation**: Gently caress the surface of the jade with your fingertips. High-quality white jade will give a delicate, oily, and warm tactile sensation, as if a thin layer of grease is attached to it, rather than feeling cold, rough, or astringent. This tactile sensation is an important indicator of 'warmth', commonly referred to as having a 'good hand feel'.
3. **Density and Structure**: The 'warmth' is closely related to the jade's density and internal fibrous interweaving structure. Jade with high density and a compact structure has better light refraction and scattering effects, which can better present a warm texture. Observe the internal structure with a strong flashlight; good white jade has a uniform structure, fine grains, and no obvious crystal granular feel.
4. **Transparency**: The transparency of white jade is usually micro-translucent or semi-translucent. Excessive transparency (high 'water head') or opacity (stiff) will affect its 'warmth' performance. Moderate transparency allows light to produce soft diffuse reflection within the jade, thereby enhancing the feeling of 'warmth'.

🏷️ White Jade,Luster,Identification 📊 intermediate 👁 0 views 👍 0 helpful