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(2000). The diamond formula. Butterworth-Heinemann. p. 115. ISBN 978-0-7506-4244-6. Archived from the original on November 9, 2023. Retrieved November...139 KB (14,992 words) - 14:29, 12 August 2024
synthesis-a gemological perspective. Butterworth-Heinemann. ISBN 978-0-7506-4244-6. O'Donoghue, Michael (2006). Gems: their sources, descriptions and...90 KB (10,010 words) - 19:56, 11 August 2024
