Tiny, metallic grain (<1mm) of analysed sorosite intergrown with other Cu phases.
Capsule sent in plastic box.
Postage combined on multiple orders.
Due to a recent spate of international customers claiming undelivered packages, international orders over £20 value will now only be sent via tracked mail. This is more expensive, but protects me from losing money on uninsured packages going missing.
Thank you for your understanding.