How do I recognise Schreger lines in ivory?

What Are Schreger Lines?

Schreger lines are fine, naturally occurring cross-hatched or V-shaped patterns found on the cross-section of ivory. Best viewed with a magnifier, these lines appear as intersecting arcs or angles, creating a unique, wavy texture that is very difficult to replicate in synthetic materials or resins.

• V-shaped or intersecting angles
• Varied spacing, often tighter near the centre
• Visible on sawn or cut ends, especially on elephant ivory

How to Inspect for Schreger Lines

For accurate identification, use a strong hand lens or jewellery loupe to examine a clean, freshly cut or polished ivory surface—ideally the cross-section. True ivory will reveal those intricate arcs or V-shapes (the Schreger lines), while alternatives like resin—such as “IWhite” – Polyurethane Casting Resin—will appear smooth or show only simple mould marks.

• Always check uncoated or unpainted areas
• Good lighting and magnification are helpful
• Compare with known resin items for practice

When This Matters

Recognising Schreger lines is especially important for antique buyers, collectors, and anyone needing to comply with regulations around the trade or restoration of ivory objects. Accurate identification helps avoid legal pitfalls and ensures ethical sourcing.