Neptunite, Gem Mine, San Benito County, California.  GRR 211
0.037 mm,  ALPHA  corrected
2186.9,  .0004
2130.1,  .0011
1998.5,  .0000
1858.0,  .0023
1686.6,  .0106
1517.8,  .0259
1423.2,  .0513
1344.3,  .076
1269.8,  .0103
1208.0,  .1016
1145.2 , .0869
1063.4 , .0704
1003.5 , .0726
942.4,  .0859
927.5,  .093
900.0,  .1155
857.2,  .1482
839.3,  .1584
802.6,  .1619
770.4,  .1507
727.3,  .1271
704.4,  .1223
650.2,  .1655
621.1,  .2726
587.2,  .504
564.5,  .7356
549.9,  .9238
544.5, 1.135
538.5, 1.1385
524.4, 1.3796
509.0, 1.6732
495.7, 1.9332
492.0, 2.0299
486.3, 2.1724
474.6, 2.4223
458.5, 2.6773
442.3, 2.8756
430.1, 2.9578
419.4, 2.984
413.6, 2.9746
407.5, 2.9418
392.4, 2.8165
380.2, 2.6513
357.7, 2.3439
349.2, 2.3075
343.1, 2.3141
338.7, 2.314
335.1, 2.3724
329.6, 2.4365
323.2, 2.5661
316.7, 2.6965
312.1, 2.8489
308.1, 2.985