https://jeltsch.org/en/tags/vantaa-blue/Recent content in Vantaa Blue on Michael’s DomainHugoen-usCopyright © 2002 - 2026 Michael Jeltsch.Fri, 24 Jul 2026 00:18:18 +0300https://jeltsch.org/en/vantaa_blue/Fri, 15 May 2026 00:00:00 +0000https://jeltsch.org/en/vantaa_blue/<p>Swedish Blue Stone is a synthetic jewelry stone made from blast-furnace slag. They were not made on purpose, but have been cast away as a byproduct of metal ore smelting during the last centuries. While in Sweden these stones are <a href="https://www.swedishbluejewelry.com/" target="_blank" rel="noopener noreferrer nofollow">commercially used&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> , nobody in Finland bothers to make a business out of them. A few hobbyist gemstone hunters - like me - have been gathering these stones over the last 50 years or so, but you can still find quite a few of these. One deposit of these blue stones is near the Pitkäkoski Rapids on the Vantaa River. I have polished a few and use them occasionally as presents.</p>