古玉的“沁色”,是埋藏数百年乃至数千年自然形成的。但现在人工做沁技术很高,颜色看着像,结构完全不同。这篇讲四种常见沁色,以及天然与人工的区别。
一、四种常见沁色
沁色是外界物质渗入玉体形成的颜色。不同埋藏环境,形成不同沁色。
土沁
埋在土中,土壤中的铁、锰渗入玉体。颜色偏黄褐、土黄。
人工:浮于表面,颜色死板。
血沁
古人以为是人血所沁,实际是铁锈沁。颜色偏红褐、枣皮红。
人工:染在表面,遇水易褪。
水银沁
实际是水银沁或乌金沁,颜色偏黑、偏灰。多见于高古玉。
人工:黑得发死,无过渡。
铜沁
与青铜器同埋,铜锈渗入。颜色偏绿、偏蓝,类似铜锈。
人工:颜色浮艳,像涂上去。
二、天然沁 vs 人工沁
天然沁
- 分布:由表入里,有渐变
- 颜色:自然、柔和,有层次
- 结构:与玉理结合,深入玉体
- 手感:沁色处与周围一致,温润
- 放大镜:可见沁色沿玉的裂隙深入
人工沁
- 分布:浮于表面,无渐变
- 颜色:死板、艳丽,缺层次
- 结构:停在表面,不进玉体
- 手感:沁色处发涩、发干
- 放大镜:颜色只在表面,无深入
三、对比表
| 特征 | 天然沁 | 人工沁 |
|---|---|---|
| 分布 | 由表入里,渐变 | 浮于表面 |
| 颜色 | 自然柔和,有层次 | 死板艳丽 |
| 结构 | 深入玉体 | 只在表面 |
| 手感 | 温润一致 | 发涩发干 |
| 放大镜 | 沿裂隙深入 | 无深入 |
四、上手怎么看?
- 看分布:沁色是否由表入里,有渐变
- 看颜色:是否自然、有层次,还是死板艳丽
- 看结构:用放大镜看沁色是否深入玉体
- 上手摸:沁色处是否与周围手感一致
五、常见误区
- 误区一:有沁就是老——沁可以人工做
- 误区二:沁色越深越老——深不一定老,可能是染色
- 误区三:血沁是血——实际是铁锈沁
- 误区四:沁色好看就真——好看可能是人工
下一步可以做什么?
- 去博物馆看高古玉真品,记住天然沁色的层次感
- 用放大镜对比天然沁和人工沁的结构差异
- 把每次看到的不同沁色拍下来,做自己的对比库
Jade stains form over centuries or millennia of burial. But artificial staining is now very good — similar colour, different structure. Here are four common stains and how to tell natural from artificial.
1. Four common stains
Stains form when external substances seep into the jade. Different burial environments produce different colours.
Soil stain
Iron and manganese from soil seep in. Yellow-brown tones.
Fake: sits on top, dead colour.
Blood stain
Once thought to be blood, actually iron rust. Red-brown tones.
Fake: on surface, washes off.
Mercury stain
Actually mercury or black-gold stain. Dark grey-black. Common in ancient jade.
Fake: dead black, no transition.
Bronze stain
Buried with bronzes; copper rust seeps in. Green-blue tones.
Fake: garish, looks painted on.
2. Natural vs artificial
Natural
- Distribution: surface inward, gradual
- Colour: natural, soft, layered
- Structure: bonded with jade, deep
- Feel: consistent with surroundings
- Loupe: stain follows jade cracks inward
Artificial
- Distribution: on surface only
- Colour: dead, bright, no layers
- Structure: stays on surface
- Feel: rough, dry
- Loupe: colour on surface, no depth
3. Comparison
| Feature | Natural | Artificial |
|---|---|---|
| Distribution | Inward, gradual | Surface only |
| Colour | Soft, layered | Dead, bright |
| Structure | Deep in jade | Surface only |
| Feel | Warm, consistent | Rough, dry |
| Loupe | Follows cracks inward | No depth |
4. How to look
- Distribution: inward with transitions?
- Colour: natural and layered, or dead and bright?
- Structure: loupe — does it go deep?
- Feel: consistent with surroundings?
5. Common misconceptions
- Stain = old — stains can be faked
- Deeper = older — could just be dye
- Blood stain = blood — it's iron rust
- Pretty stain = real — pretty might be artificial