While there are over a dozen published locations in which glendonites have formed, there are likely to be many more, perhaps even hundreds or thousands more. As indicated by the series of flags above, they can be found all over the world. Ikaite, the precursor to the pseudomorphic glendonite, exhibits an amazing array of variations of its base dipyramidal form.

A collector in Oregon actually owns a piece of property that overlaps an extensive deposit of glendonites - when he goes prospecting for crystals he doesn't have to go far, and has to be careful to not slash his boots on the sharp pseudos sticking out of the muddy surface. These specimens are almost all the dipyramidal, singular blade-type, up to 6 inches in length. He has well over a thousand glendonites, some eroded by the elements and some retaining their virgin surfaces.

In Japan an intrepid explorer finds heavily-weathered glendonites in a hidden location -- large, sharp, stellate examples with real presence. Several localities in Japan are known for their "ghost" genno-ishi -- hard limestone cobbles with square holes running through them. These were once thought to be anchors crafted by native peoples, but in fact are the void-bearing concretion left behind after the calcite pseudomorph within has completely dissolved. This dissolving action of salwater damages the majority of specimens found near the oceans, as can the silty matrix surrounding the pseudos over time, destroy their fine surface features.

Oddly, some of the most pristine specimens are found encased in the hardest concretions, yet the pseudos did not interact with the formation of the concretion. Calcite pseudomorphs after ikaite form in many shades of brown, from a light, vibrant orange to a deep cocoa color, and are always opaque. Currently it is unknown why they are restricted to this color range when calcite in other forms or pseudos forms take on a wider range of color and transparency. Opal pseudomorphs after ikaite ("pineapples") are extremely colorful and pleasant to view; and are currently found in only one location -- Coober Pedy, Australia.