Switch to preferred accessibility theme:

• High contrast
• Low graphics
• Mobile version
• Default theme

Increase or decrease the text size:

• Internet Explorer: View > Text Size > Largest

Keyboard navigation and access keys:

• A - Accessibility options
• 0 - Skip navigation
• 1 - Home
• 2 - Alexandrite chapters
• 3 - Alexandrite directory
• 4 - Alexandrite forums
• 5 - Alexandrite gemstones
• 6 - Alexandrite localities
• 7 - Contact information
• 8 - About Alexandrite Guide
• 9 - Sitemap
• Press ALT + Access Key, then ENTER.

This section has no relevant content published at this time.

AMA style

David Weinberg. "Definition of Pegmatite". In Alexandrite Tsarstone Collectors Guide. July 03, 2010, 04:44 UTC. Available at: http://w.alexandrite.com/viewpage.html?id=GG-101-00001. Accessed May 31, 2026.

APA style

"Definition of Pegmatite". (2010, July 03). In Alexandrite Tsarstone Collectors Guide. Retrieved 12:30, May 31, 2026, from http://w.alexandrite.com/viewpage.html?id=GG-101-00001.

Bluebook style

"Definition of Pegmatite", http://w.alexandrite.com/viewpage.html?id=GG-101-00001 (last visited May 31, 2026).

Bluebook: Harvard JOLT style

See Alexandrite Tsarstone Collectors Guide, "Definition of Pegmatite", http://w.alexandrite.com/viewpage.html?id=GG-101-00001 (A light-colored, coarse-grained igneous rock from granite clan containing orthoclase, quartz, microline, mica, gemstones, and many ferromagnesian minerals resulting from slow solidification. Pegmatite is occurring place of many uncommon gem minerals such as beryl, topaz, tourmaline, etc. Also called giant granite.) (as of May. 31, 2026, 12:30 GMT).

CBE/CSE style

David Weinberg. "Definition of Pegmatite". In Alexandrite Tsarstone Collectors Guide. 2010 Jul 03, 04:44 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2010 Jul 03, 04:44 UTC [cited 2026 May 31]. Available from: http://w.alexandrite.com/viewpage.html?id=GG-101-00001.

Chicago style

David Weinberg, "Definition of Pegmatite", http://w.alexandrite.com/viewpage.html?id=GG-101-00001, (accessed May 31, 2026).

MLA style

"Definition of Pegmatite". Alexandrite Tsarstone Collectors Guide. 03 Jul 2010, 04:44 UTC. 31 May 2026 http://w.alexandrite.com/viewpage.html?id=GG-101-00001

MHRA style

David Weinberg, "Definition of Pegmatite", Alexandrite Tsarstone Collectors Guide, 03 July 2010, 04:44 UTC, http://w.alexandrite.com/viewpage.html?id=GG-101-00001 [accessed 31 May 2026].