Mineral Photography: Capturing Specimen Beauty

## Why Photograph Your Minerals

Quality photographs document your collection, enable sharing with other collectors, and create a visual record that aids identification and insurance valuation. With basic equipment, anyone can produce stunning mineral images.

## Essential Equipment

| Item | Budget Option | Professional Option |
|------|--------------|--------------------|
| Camera | Smartphone with macro mode | DSLR/mirrorless with macro lens |
| Lighting | Desk lamp + diffuser | LED panel or ring light |
| Background | Black velvet cloth | Graduated backdrop |
| Tripod | Phone tripod ($15) | Full tripod with ball head |
| Focus rail | Manual slider ($30) | Automated focus rail |

## Lighting Techniques

### Key Lighting Principles

- **Diffused light** eliminates harsh reflections on vitreous minerals like quartz (SiO₂, Mohs 7) and topaz (Al₂SiO₄(F,OH)₂, Mohs 8)
- **Side lighting** reveals crystal faces and surface texture on metallic minerals like pyrite (FeS₂) and galena (PbS)
- **Backlighting** showcases translucency in minerals like fluorite (CaF₂) and calcite (CaCO₃)
- **Dark field lighting** creates dramatic contrast for transparent crystals

### Dealing with Metallic Luster

Metallic minerals reflect light intensely. Use a polarizing filter and diffuse your light source. For highly reflective species like native silver or galena, try cross-polarization with filters on both the light and the lens.

## Focus Stacking

Mineral specimens are three-dimensional, so a single photo cannot capture the entire specimen in focus. Focus stacking combines multiple images taken at different focus distances.

### Workflow

1. Mount camera on tripod or focus rail
2. Set aperture to f/8–f/11 for sharpness
3. Take 10–30 frames, shifting focus incrementally from front to back
4. Stack using Helicon Focus, Zerene Stacker, or Photoshop
5. The result: edge-to-edge sharpness across the entire specimen

## Post-Processing Tips

- **White balance**: Set manually to match your lighting (avoid auto)
- **Sharpening**: Apply lightly; over-sharpening creates artifacts
- **Color accuracy**: Photograph a color reference card with each session
- **Scale**: Always include a scale bar or reference object in at least one image