https://jeltsch.org/en/tags/minerals/Recent content in Minerals on Michael’s DomainHugoen-usCopyright © 2002 - 2026 Michael Jeltsch.Fri, 24 Jul 2026 00:18:18 +0300https://jeltsch.org/en/gemstone_hunting/Wed, 31 May 2017 00:00:00 +0000https://jeltsch.org/en/gemstone_hunting/<p>Last Sunday, we participated in the spring excursion of the Finnish Gemstone Hobbyists’ Society ( <a href="https://www.sjhy.fi/en_GB/" target="_blank" rel="noopener noreferrer nofollow">Suomen Jalokiviharrastajain Yhdistys&nbsp; <svg class="svg-inline--fa fas fa-up-right-from-square fa-2xs" fill="currentColor" aria-hidden="true" role="img" viewBox="0 0 512 512" overflow="visible"><use href="#fas-up-right-from-square"></use></svg></a> ) to a spectrolite quarry near Ylämaa in Finnish Carelia. <a href="https://en.wikipedia.org/wiki/Spectrolite" target="_blank" rel="noopener noreferrer nofollow">Spectrolite&nbsp; <svg class="svg-inline--fa fas fa-up-right-from-square fa-2xs" fill="currentColor" aria-hidden="true" role="img" viewBox="0 0 512 512" overflow="visible"><use href="#fas-up-right-from-square"></use></svg></a> is a variety of <a href="https://en.wikipedia.org/wiki/Labradorite" target="_blank" rel="noopener noreferrer nofollow">labradorite&nbsp; <svg class="svg-inline--fa fas fa-up-right-from-square fa-2xs" fill="currentColor" aria-hidden="true" role="img" viewBox="0 0 512 512" overflow="visible"><use href="#fas-up-right-from-square"></use></svg></a> , which shows a rich iridescense. The Finnish spectrolite is peculiar because of its dark base color. Strictly speaking, the term &ldquo;spectrolite&rdquo; applies to the Finnish variety of iridescent labratorite only. The trip was a success as we returned tired and with many kilograms of specimens.</p>