Skip to content

Please be aware that some material may contain words, descriptions or illustrations which will not reflect current scientific understanding and may be considered in today's context inaccurate, unethical, offensive or distressing.

Description

Contains two plates.

Subject: Geology

Published in Philosophical Transactions, as 'An enquiry into the original state and properties of spars, or crystals found in the Cornish mines, called Cornish Diamonds. In a letter to Emanuel Mendez da Costa, Esq; F. R. S. From the Rev. Mr. Wm. Borlace.'

Read 3 May 1750

Reference number
L&P/2/7
Earliest possible date
18 December 1749
Physical description
Ink on paper with two plates
Page extent
29 pages
Format
Manuscript

Creator name

William Borlase

View page for William Borlase

Use this record

Citation

William Borlase, Paper, 'Of spars and Cornish diamonds' by William Borlase, 18 December 1749, L&P/2/7, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/l-and-p_2_7/paper-of-spars-and-cornish-diamonds-by-william-borlase, accessed on 13 November 2025

Link to this record

Embed this record

<iframe src="https://makingscience.royalsociety.org/embed/items/l-and-p_2_7/paper-of-spars-and-cornish-diamonds-by-william-borlase" title="Paper, 'Of spars and Cornish diamonds' by William Borlase" allow="fullscreen" frameborder="0" width="100%" height="500px"></iframe>

Related Fellows

Explore the collection

  • Letters and Papers

    'Letters and Papers' contains the scientific correspondence sent to the Royal Society through the 18th century, many of which were published in its journal.

    Dates: 1741 - 1806

    View collection