Jadeite in 3D: Raman Mapping & Internal Mineral Distribution

Behind jadeite’s polished surface lies a hidden world of interwoven minerals. Traditional gemological tools can only tell part of the story—but with 3D Raman mapping, gemologists now visualize jadeite’s internal structure with stunning precision. This technique reveals the mineral intergrowths, composition transitions, and crystal domains that define a stone’s quality and identity.

🎯 What Is 3D Raman Mapping?

Unlike point-based Raman spectroscopy, which analyzes a single spot, 3D Raman mapping scans a selected area layer by layer—generating a full mineralogical map in three dimensions. It works by:

1. Focusing a laser beam onto the sample’s surface
2. Collecting vibrational signals at micrometer-level resolution
3. Assigning color codes to different mineral phases (e.g., jadeite, omphacite, feldspar)
4. Stacking depth scans to form a volumetric mineral map

In jadeite, the most common targets for differentiation are:

• Jadeite (NaAlSi₂O₆) → Raman peak at ~689 cm⁻¹
• Omphacite (Ca-Fe-Mg pyroxene) → Raman peak at ~679 cm⁻¹

🟢🔴 Green vs. Red: A Tale of Two Phases

In visual renderings, green zones typically represent jadeite, while red or orange zones signify omphacite. When both minerals coexist in one specimen, the map reveals a patchy or fibrous intergrowth, often with sharp or transitional boundaries.

This kind of insight allows gemologists to:

• Identify mixed-composition stones (common in Guatemalan jadeite)
• Detect invisible structural zoning that affects durability and polish
• Classify jadeite by purity, a major factor in value grading

🧠 Why It Matters for Grading

While color and transparency are still crucial to consumer preference, internal mineral distribution defines the gem’s classification. For high-value certification, 3D Raman mapping offers:

• Scientific proof of mineral purity
• Insight into intergrowth patterns linked to origin
• Quality assurance for bespoke jewelry clients and institutional collectors

In short, Raman mapping doesn’t just look deeper—it adds clarity, trust, and value to every jadeite narrative.