[Pramāṇa](https://indike.org/pramana/) › [Physical](https://indike.org/pramana/inp) › [Artefacts](https://indike.org/pramana/inp.artefact) › [The British Museum, London](https://indike.org/pramana/inp.artefact.bm) › Sample # Sample A natural fragment of quartz. - **Kind:** artefact - **Date:** 4000–3500 BCE --- Source: [https://indike.org/pramana/inp.artefact.bm.1986-1018-114](https://indike.org/pramana/inp.artefact.bm.1986-1018-114) · Pramāṇa