翡翠鑑別
翡翠起光係咩？起鋼光、玻璃光、油光有咩分別？
Jadeite Luster Explained: Steel Gloss, Glass Gloss, and Oil Gloss
翡翠嘅光澤係判斷種水嘅重要指標。起鋼光、起玻璃光、起油光各有唔同特徵，代表唔同嘅種水等級。呢篇文章幫你一次搞清楚。
翡翠嘅光澤（起光）係評估種水嘅重要指標之一。唔同種水嘅翡翠，起光嘅方式同質感都唔同。了解起光嘅類型，可以幫助你更準確地判斷翡翠嘅種水等級同品質。
三種主要光澤類型
一、起鋼光（Steel Gloss）
起鋼光係翡翠光澤中最高等級嘅一種，主要出現在玻璃種同高冰種翡翠上。光線在翡翠表面形成清晰、銳利嘅反射，就像鋼鐵或鏡面一樣。起鋼光嘅翡翠表面反光非常集中，光點清晰，移動時光點跟隨移動，有強烈嘅'活'嘅感覺。
二、起玻璃光（Glass Gloss）
起玻璃光係冰種翡翠最常見嘅光澤類型。光澤明亮通透，類似玻璃表面嘅反光，但比起鋼光略為柔和。起玻璃光嘅翡翠透明度高，光線可以穿透翡翠內部，形成通透嘅視覺效果。
三、起油光 / 起膠光（Oil / Jelly Gloss）
起油光（又稱起膠光）係老坑翡翠獨有嘅光澤特徵，主要出現在糯種至冰糯種翡翠上。光線在翡翠表面形成柔和嘅漫反射，就像油脂或果凍一樣，光澤溫潤而有深度。起油光嘅翡翠唔會有強烈嘅鏡面反射，而係整體散發出一種溫潤嘅光感。
三種光澤對比表
| 光澤類型 | 視覺特徵 | 對應種水 | 觸感 |
|---|---|---|---|
| 起鋼光 | 銳利集中，鏡面反射，光點清晰 | 玻璃種、高冰種 | 光滑如鏡 |
| 起玻璃光 | 明亮通透，光澤均勻 | 冰種 | 光滑清澈 |
| 起油光/起膠光 | 柔和漫反射，溫潤有深度 | 糯冰種、糯種老坑 | 溫潤如脂 |
點樣觀察翡翠嘅光澤？
- 在自然光下觀察：自然光最能真實反映翡翠嘅光澤類型
- 移動翡翠：觀察光點係咪跟隨移動，光點越清晰代表種水越好
- 觀察反射：鋼光反射清晰銳利，玻璃光反射均勻，油光反射柔和
- 感受溫潤感：起膠嘅翡翠在視覺上有一種'包裹感'，光澤唔刺眼
💡 專業提示：起鋼光 > 起玻璃光 > 起油光，並非代表油光嘅翡翠品質差。起油光嘅糯種老坑翡翠同樣具有很高嘅價值，只係種水類型唔同。判斷翡翠品質要綜合考慮種、水、色、底、工五個要素。
English Version
Jadeite Luster Explained: Steel Gloss, Glass Gloss, and Oil Gloss
Lustre is one of the most important indicators of jadeite quality grade. Different grades of jadeite reflect light in distinctly different ways. Understanding the three main lustre types will help you more accurately assess a piece of jadeite.
The Three Main Lustre Types
1. Steel Gloss (起鋼光)
Steel gloss is the highest grade of jadeite lustre, found primarily on glass-type (玻璃種) and high-ice-type (高冰種) jadeite. Light forms a sharp, concentrated mirror-like reflection on the surface — similar to polished steel or a mirror. The reflection point is crisp and follows the stone as it moves, creating a vivid sense of life and energy.
2. Glass Gloss (起玻璃光)
Glass gloss is the most common lustre type for ice-type (冰種) jadeite. The lustre is bright and transparent, similar to the reflection off glass, but slightly softer than steel gloss. Ice-type jadeite with glass gloss has high transparency — light penetrates the stone and creates a clear, translucent visual effect.
3. Oil / Jelly Gloss (起油光 / 起膠光)
Oil gloss (also called jelly gloss) is a lustre characteristic unique to old-mine (老坑) jadeite, primarily found in nuo-type (糯種) to nuo-ice-type (糯冰種) material. Light forms a soft, diffuse reflection on the surface — like oil or jelly — creating a warm, deep glow. Rather than a sharp mirror reflection, the stone radiates a gentle, enveloping luminosity.
Lustre Comparison Table
| Lustre Type | Visual Characteristics | Corresponding Grade | Feel |
|---|---|---|---|
| Steel Gloss | Sharp, concentrated mirror reflection; crisp light point | Glass-type, High-ice-type | Smooth as a mirror |
| Glass Gloss | Bright, transparent, even lustre | Ice-type | Smooth and clear |
| Oil / Jelly Gloss | Soft diffuse reflection; warm and deep | Nuo-ice-type, Old-mine Nuo-type | Warm and waxy |
How to Observe Jadeite Lustre
- Observe in natural light: natural light most accurately reveals the true lustre type
- Rotate the stone: watch whether the light point follows movement — a crisper point indicates higher quality
- Compare reflections: steel gloss is sharp and concentrated; glass gloss is even; oil gloss is soft
- Feel the warmth: jelly-gloss jadeite has a visual 'enveloping' quality — the lustre is never harsh
💡 Expert note: Steel gloss > Glass gloss > Oil gloss does not mean oil-gloss jadeite is inferior. Old-mine nuo-type jadeite with oil gloss can be extremely valuable — the lustre type reflects the quality category, not an absolute ranking. Always evaluate jadeite across all five dimensions: texture (種), transparency (水), colour (色), base clarity (底), and craftsmanship (工).