Browse > Article

The color enhancement of natural Zambian amethyst by the hydrothermal treatment method  

박춘원 (동신대학교 대학원 보석공학과)
김판채 (동신대학교 대학원 보석공학과)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.14, no.2, 2004 , pp. 73-77 More about this Journal
Abstract
The color enhancement for natural Zambian amethyst of low quality was carried out by the hydrothermal treatment method. The hydrothermal treatment conditions were as follows: reaction temperature; $300^{\circ}C$, duration; 30 hrs, filling; 40%, solvent; 6 M-HCI solution. The reddish purple amethyst of high quality was obtained under these conditions. From the result of ICP/AES, it was known that color enhancement was affected by a Fe elemental content to exist in the inside of natural Zambian amethyst. Also, from the result of UY-VIS-NIR, it was shown that the absorption peak at 550 nm after hydrothermal treatment is slightly lower than those of non-treated natural Zambian amethyst. In this study, it was known that hydrothermal treatment method was a way to suitable for increase of commercial value of natural Zambian amethyst.
Keywords
Natural Zambian amethyst; Hydrothermal treatment; Color enhancement;
Citations & Related Records
연도 인용수 순위
  • Reference
1 /
[ J.K.Choi;P.C.Kim ] / KR-A-98-74414
2 /
[ K.Nassau ] / The physics and chemistry of color
3 Synthetic of inorganic crystal material by the hydrothermal reaction /
[ S.Hirano ] / Ceramics data book
4 EPR Study of iron centers in natural amethyst /
[ C.S.han ] / J. K. Phys.   과학기술학회마을
5 Growing, mineralogical and gemmological study of synthetic amethyst /
[ W.S.Kim;S.S.Lee;K.J.Na ] / J. K. Earth Sci. Soc.
6 /
[ K.Nassau ] / Gems made by man
7 /
[ W.Schumann ] / Gemstones of the world
8 /
[ J.E.Arem ] / Color encyclopedia of gemstones
9 /
[ K.Nassau ] / Gemstone enhancement
10 Gemstone enhancement and its detection in the 1980s /
[ R.C.kammerling;J.I.Koivula;R.E.Kane ] / Gens & Gemology   DOI