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Iran | http://iranian-agates.freeservers.com/ |
| http://iranian-agates.freeservers.com/ |
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USA | |
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| Troxel, Bennie Wyatt & P.K. Morton (1962), Mines and mineral resources of Kern County, California: California Division Mines & Geology County Report No. 1, 370 pp.: 91-92; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 346. |
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| Gems and Minerals of America- Jay Ellis Ransom-1974 |
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| The Mineralogist, v. 9, no. 6, p. 222 |
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| Jay Ellis Ransom,1974,Gems and Minerals of America |
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| Jay Ellis Ransom,1974,Gems and Minerals of America |
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| Kunz,1892: Gems & Precious Stones of N. America, p.133. |
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| Jay Ellis Ransom,1974, Gems and Minerals of America |
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| Lapidary Journal 31:179. |