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Jewelry, Gems, & Minerals/rocks in home display


I do not know if you can help but i have completely exhausted the internet with NO luck...
I have been given a beautiful sample of an amethyst geode that I want to display in my home, but it does not have a flat side for standing. I have seen many photos of these large pieces where a material has been molded around the stone to form a flat bottom. I do NOT wish to place this piece on a stand, but prefer to learn how dealers mold this flat surface and with what material.

We sometimes run into a similar problem for our display of specimens here at the university. Our solution is to use play-dough to mold just enough around the specimen to prop it up in the correct position. Play-dough can be easily removed and residue can be washed from the specimen if research or testing is required. You can find / mix play-dough in a similar color to the specimen so it does not show. A more permanent solution is to use polymer clay, available in craft stores, which will harden or cure at temperatures created in a typical home oven(265 to 275 橮 You can either sculpt it around your specimen and then bake it in your oven, which would include heating your specimen as well. Usually not a problem for silicate minerals, careless heat shock upon removal may break delicate specimens. A better method would be to mold the clay as desired, then carefully remove from specimen without changing its shape and firing/curing separately. Hardened polymer clays can be painted to match your specimen color.  

Jewelry, Gems, & Minerals

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Uwe Richard Kackstaetter, Ph.D. (Dr.K)


I can answer questions concerning minerals, mineralogy, gems, metals, and anything that has to do with geology. However, I am NOT a jeweler. Questions about values, settings, gem stone cuts and appraisals are best directed to other experts on this site. I can however aide in the identification of unknown mineral materials. As a public service and part as training for new geoscientists, our university department provides FREE mineral identification for individuals. Please contact me for details or go to for details..


I am a professor of applied geology and mineralogy with many hours of field experience. Furthermore, I enjoy recreational gold prospecting and mineral collecting. As a professor I am engaged in research concerning minerals and their occurrence.

Member of the GPAA (Gold Prospectors Association of America) as well as the Association of Environmental Geochemists. Member of the GSA (Geologic Society of America) Member of the AIPG (American Institute of Professional Geologists)

Here is a small sampling: Mineral-rock handbook: Rapid-easy mineral-rock determination : written for anyone interested in minerals and rocks - Proctor, Peterson, and Kackstaetter;Macmillan Pub. Co. (New York and Toronto and New York) Physical Geology Laboratory e-Manual [CD-ROM], Kackstaetter, Earth Science Education LLC Colorado Front Range Self-guided Geology Field Trips, Kackstaetter,

Ph.D. in Applied Geology and Mineralogy. I am actively teaching courses in mineralogy and a variety of field courses with mineral collecting opportunities. Background in precious metal exploration.

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