Corundum, GRR1020a, locality unknown (Australia?), medium blue sapphire 4.289 mm, E perp c 1599.2, 0.15440 1596.9, 0.14854 1594.6, 0.15100 1592.2, 0.14649 1589.9, 0.15070 1587.6, 0.14993 1585.2, 0.15124 1582.9, 0.15265 1580.6, 0.15297 1578.2, 0.14859 1575.9, 0.14945 1573.6, 0.15172 1571.2, 0.15417 1568.9, 0.15053 1566.6, 0.14987 1564.2, 0.15192 1561.9, 0.15307 1559.6, 0.15090 1557.2, 0.15229 1554.9, 0.15663 1552.6, 0.15687 1550.2, 0.15795 1547.9, 0.15300 1545.6, 0.15404 1543.2, 0.15382 1540.9, 0.15683 1538.6, 0.15593 1536.2, 0.15567 1533.9, 0.15643 1531.6, 0.15478 1529.2, 0.15893 1526.9, 0.15957 1524.6, 0.16017 1522.2, 0.16172 1519.9, 0.16027 1517.5, 0.16305 1515.2, 0.16023 1512.9, 0.16285 1510.5, 0.16282 1508.2, 0.16431 1505.9, 0.16250 1503.5, 0.16115 1501.2, 0.16910 1498.8, 0.16003 1496.5, 0.16141 1494.2, 0.16838 1491.8, 0.16816 1489.5, 0.17063 1487.1, 0.16582 1484.8, 0.16989 1482.5, 0.16482 1480.1, 0.16947 1477.8, 0.16893 1475.4, 0.17322 1473.1, 0.17200 1470.8, 0.17279 1468.4, 0.17255 1466.1, 0.17000 1463.7, 0.17085 1461.4, 0.17734 1459.1, 0.17358 1456.7, 0.17333 1454.4, 0.17790 1452.0, 0.17669 1449.7, 0.17761 1447.4, 0.17921 1445.0, 0.18140 1442.7, 0.18150 1440.3, 0.18027 1438.0, 0.17984 1435.6, 0.18392 1433.3, 0.18169 1430.9, 0.18481 1428.6, 0.18692 1426.3, 0.18574 1423.9, 0.18615 1421.6, 0.18963 1419.2, 0.18991 1416.9, 0.18926 1414.5, 0.19318 1412.2, 0.19287 1409.8, 0.19201 1407.5, 0.19129 1405.2, 0.19564 1402.8, 0.20093 1400.5, 0.19795 1398.1, 0.20093 1395.8, 0.20285 1393.4, 0.19971 1391.1, 0.20681 1388.7, 0.20935 1386.4, 0.21018 1384.0, 0.21017 1381.7, 0.21020 1379.3, 0.21331 1377.0, 0.21211 1374.6, 0.21373 1372.3, 0.21662 1369.9, 0.21476 1367.6, 0.21767 1365.2, 0.21854 1362.9, 0.21820 1360.5, 0.22507 1358.2, 0.22364 1355.8, 0.23026 1353.5, 0.22803 1351.1, 0.22677 1348.8, 0.22721 1346.4, 0.23179 1344.1, 0.23417 1341.7, 0.23741 1339.4, 0.24033 1337.0, 0.24072 1334.7, 0.24068 1332.3, 0.24340 1330.0, 0.24488 1327.6, 0.24940 1325.3, 0.25171 1322.9, 0.25026 1320.6, 0.25631 1318.2, 0.26083 1315.9, 0.26158 1313.5, 0.26216 1311.2, 0.26757 1308.8, 0.26962 1306.5, 0.27051 1304.1, 0.27332 1301.8, 0.27545 1299.4, 0.27851 1297.0, 0.28229 1294.7, 0.28535 1292.3, 0.29063 1290.0, 0.29262 1287.6, 0.29408 1285.3, 0.30025 1282.9, 0.30443 1280.6, 0.30525 1278.2, 0.30919 1276.3, 0.31434 1273.9, 0.32092 1271.6, 0.32139 1269.2, 0.32966 1266.9, 0.33071 1264.5, 0.33660 1262.2, 0.33895 1259.8, 0.34325 1257.5, 0.34859 1255.1, 0.35030 1252.8, 0.35703 1250.4, 0.36250 1248.0, 0.36457 1245.7, 0.37276 1243.3, 0.37673 1241.0, 0.38314 1238.6, 0.38972 1236.3, 0.39351 1233.9, 0.39949 1231.6, 0.40268 1229.2, 0.40965 1226.8, 0.41468 1224.5, 0.42004 1222.1, 0.42707 1219.8, 0.43647 1217.4, 0.44376 1215.1, 0.45000 1212.7, 0.45612 1210.4, 0.46404 1208.0, 0.47259 1205.6, 0.47969 1203.3, 0.48205 1200.9, 0.49097 1198.6, 0.50007 1196.2, 0.50598 1193.8, 0.51233 1191.5, 0.52462 1189.1, 0.53363 1186.8, 0.54242 1184.4, 0.55030 1182.0, 0.55664 1179.7, 0.56900 1177.3, 0.57882 1175.0, 0.58528 1172.6, 0.59948 1170.2, 0.60921 1167.9, 0.62136 1165.5, 0.62804 1163.2, 0.63859 1160.8, 0.64808 1158.4, 0.66232 1156.1, 0.67165 1153.7, 0.68544 1151.3, 0.69592 1149.0, 0.70663 1146.6, 0.72015 1144.3, 0.73231 1141.9, 0.74308 1139.5, 0.75643 1137.2, 0.76951 1134.8, 0.78291 1132.4, 0.79664 1130.1, 0.81073 1127.7, 0.82376 1125.3, 0.84198 1123.0, 0.85111 1120.6, 0.86839 1118.2, 0.88162 1115.9, 0.89770 1113.5, 0.91235 1111.1, 0.92844 1108.8, 0.94305 1106.4, 0.96315 1104.0, 0.97642 1101.7, 0.99165 1099.3, 1.00935 1096.9, 1.02372 1094.6, 1.04202 1092.2, 1.06250 1089.8, 1.08004 1087.5, 1.09583 1085.1, 1.11451 1082.7, 1.13359 1080.4, 1.15170 1078.0, 1.17177 1075.6, 1.19129 1073.2, 1.20882 1070.9, 1.22760 1068.5, 1.25002 1066.1, 1.26833 1063.8, 1.28718 1061.4, 1.30737 1059.0, 1.32845 1056.6, 1.34986 1054.3, 1.36984 1051.9, 1.39075 1049.5, 1.41417 1047.2, 1.43499 1044.8, 1.45711 1042.4, 1.47699 1040.0, 1.49846 1037.7, 1.52145 1035.3, 1.54176 1032.9, 1.56455 1030.5, 1.58562 1028.2, 1.60569 1025.8, 1.63216 1023.4, 1.65426 1021.0, 1.67729 1018.7, 1.70108 1016.3, 1.72274 1013.9, 1.74412 1011.5, 1.76868 1009.2, 1.78886 1006.8, 1.80929 1004.4, 1.83449 1002.0, 1.85777 1000.6, 1.86719 999.4, 1.87559 998.2, 1.89183 997.0, 1.90076 995.8, 1.91348 994.7, 1.92511 993.5, 1.93668 992.3, 1.94535 991.1, 1.96093 989.9, 1.96701 988.7, 1.98619 987.5, 1.99573 986.4, 2.00599 985.2, 2.01863 984.0, 2.03422 982.8, 2.04519 981.6, 2.05515 980.4, 2.06140 979.2, 2.08107 978.1, 2.09080 976.9, 2.10362 975.7, 2.11100 974.5, 2.12240 973.3, 2.13749 972.1, 2.14787 970.9, 2.15757 969.8, 2.17365 968.6, 2.17750 967.4, 2.19091 966.2, 2.20217 965.0, 2.21232 963.8, 2.22122 962.6, 2.23519 961.5, 2.24365 960.3, 2.26244 959.1, 2.26147 957.9, 2.27607 956.7, 2.28536 955.5, 2.30551 954.3, 2.30261 953.1, 2.31930 952.0, 2.33133 950.8, 2.35047 949.6, 2.35775 948.4, 2.36575 947.2, 2.36378 946.0, 2.39599 944.8, 2.37242 943.7, 2.39492 942.5, 2.40727 941.3, 2.41523 940.1, 2.42368 938.9, 2.42731 937.7, 2.43727 936.5, 2.44345 935.3, 2.44793 934.2, 2.46288 933.0, 2.47351 931.8, 2.46865 930.6, 2.48140 929.4, 2.48606 928.2, 2.49746 927.0, 2.50053 925.8, 2.51269 924.7, 2.51473 923.5, 2.52000 922.3, 2.52791 921.1, 2.53139 919.9, 2.54411 918.7, 2.54957 917.5, 2.54832 916.3, 2.56497 915.1, 2.56557 914.0, 2.57642 912.8, 2.58323 911.6, 2.58042 910.4, 2.59443 909.2, 2.59836 908.0, 2.59454 906.8, 2.60363 905.6, 2.61191 904.5, 2.60412 903.3, 2.61649 902.1, 2.61677 900.9, 2.61856 899.7, 2.62270 898.5, 2.62133 897.3, 2.62974 896.1, 2.63289 894.9, 2.63712 893.8, 2.63792 892.6, 2.64692 891.4, 2.64400 890.2, 2.64716 889.0, 2.66165 887.8, 2.65597 886.6, 2.65828 885.4, 2.65343 884.2, 2.66266 883.1, 2.65187 881.9, 2.64969 880.7, 2.65586 879.5, 2.65315 878.3, 2.65477 877.1, 2.66658 875.9, 2.65576 874.7, 2.65785 873.5, 2.65996 872.3, 2.65324 871.2, 2.65812 870.0, 2.66417 868.8, 2.65580 867.6, 2.65682 866.4, 2.65401 865.2, 2.65111 864.0, 2.64952 862.8, 2.65101 861.6, 2.63980 860.4, 2.63676 859.3, 2.62992 858.1, 2.62966 856.9, 2.62357 855.7, 2.62224 854.5, 2.61884 853.3, 2.61738 852.1, 2.61566 850.9, 2.61984 849.7, 2.61287 848.5, 2.60875 847.4, 2.61041 846.2, 2.60073 845.0, 2.60025 843.8, 2.58923 842.6, 2.58276 841.4, 2.57312 840.2, 2.55895 839.0, 2.56025 837.8, 2.55001 836.6, 2.54521 835.4, 2.53795 834.3, 2.52943 833.1, 2.52078 831.9, 2.52344 830.7, 2.51240 829.5, 2.51458 828.3, 2.50296 827.1, 2.49916 825.9, 2.48452 824.7, 2.47915 823.5, 2.46782 822.3, 2.46173 821.1, 2.44596 820.0, 2.43728 818.8, 2.42900 817.6, 2.41848 816.4, 2.41065 815.2, 2.40209 814.0, 2.39565 812.8, 2.38722 811.6, 2.38079 810.4, 2.36886 809.2, 2.36196 808.0, 2.35303 806.8, 2.34215 805.7, 2.33022 804.5, 2.31692 803.3, 2.30559 802.1, 2.29466 800.9, 2.28154 799.7, 2.27075 798.5, 2.26516 797.3, 2.25096 796.1, 2.24408 794.9, 2.23486 793.7, 2.22383 792.5, 2.21320 791.3, 2.20411 790.2, 2.19088 789.0, 2.18179 787.8, 2.16794 786.6, 2.15699 785.4, 2.14299 784.2, 2.13144 783.0, 2.11964 781.8, 2.10815 780.6, 2.09980 779.4, 2.08797 778.2, 2.07799 777.0, 2.07004 775.8, 2.05863 774.6, 2.04839 773.5, 2.03365 772.3, 2.02432 771.1, 2.01071 769.9, 1.99792 768.7, 1.98628 767.5, 1.97546 766.3, 1.96294 765.1, 1.95338 763.9, 1.94311 762.7, 1.93294 761.5, 1.92441 760.3, 1.91263 759.1, 1.90184 757.9, 1.89060 756.7, 1.87914 755.6, 1.86812 754.4, 1.85577 753.2, 1.84560 752.0, 1.83396 750.8, 1.82372 749.6, 1.81555 748.4, 1.80401 747.2, 1.79475 746.0, 1.78671 744.8, 1.77604 743.6, 1.76584 742.4, 1.75603 741.2, 1.74661 740.0, 1.73446 738.8, 1.72480 737.6, 1.71424 736.4, 1.70472 735.3, 1.69642 734.1, 1.68876 732.9, 1.67976 731.7, 1.67091 730.5, 1.66218 729.3, 1.65248 728.1, 1.64460 726.9, 1.63470 725.7, 1.62584 724.5, 1.61659 723.3, 1.60804 722.1, 1.59996 720.9, 1.59180 719.7, 1.58433 718.5, 1.57701 717.3, 1.56964 716.1, 1.56229 714.9, 1.55373 713.7, 1.54537 712.5, 1.53599 711.4, 1.52995 710.2, 1.52196 709.0, 1.51417 707.8, 1.50889 706.6, 1.50187 705.4, 1.49556 704.2, 1.48814 703.0, 1.48317 701.8, 1.47632 700.6, 1.46746 699.4, 1.46026 698.2, 1.45450 697.0, 1.44835 695.8, 1.44204 694.6, 1.43748 693.4, 1.43186 692.2, 1.42618 691.0, 1.42045 689.8, 1.41382 688.6, 1.40846 687.4, 1.40206 686.2, 1.39647 685.0, 1.39130 683.8, 1.38665 682.7, 1.38114 681.5, 1.37750 680.3, 1.37256 679.1, 1.36775 677.9, 1.36296 676.7, 1.35830 675.5, 1.35295 674.3, 1.34840 673.1, 1.34421 671.9, 1.33984 670.7, 1.33619 669.5, 1.33223 668.3, 1.32861 667.1, 1.32323 665.9, 1.31899 664.7, 1.31555 663.5, 1.31130 662.3, 1.30742 661.1, 1.30423 659.9, 1.30062 658.7, 1.29834 657.5, 1.29540 656.3, 1.29189 655.1, 1.28873 653.9, 1.28531 652.7, 1.28292 651.5, 1.27992 650.3, 1.27695 649.1, 1.27502 647.9, 1.27261 646.7, 1.27034 645.5, 1.26840 644.3, 1.26611 643.2, 1.26352 642.0, 1.26103 640.8, 1.25945 639.6, 1.25716 638.4, 1.25594 637.2, 1.25549 636.0, 1.25337 634.8, 1.25172 633.6, 1.25069 632.4, 1.24868 631.2, 1.24774 630.0, 1.24709 628.8, 1.24488 627.6, 1.24468 626.4, 1.24426 625.2, 1.24358 624.0, 1.24287 622.8, 1.24203 621.6, 1.24109 620.4, 1.24025 619.2, 1.24016 618.0, 1.24030 616.8, 1.24036 615.6, 1.24000 614.4, 1.23908 613.2, 1.23865 612.0, 1.23818 610.8, 1.23783 609.6, 1.23761 608.4, 1.23798 607.2, 1.23819 606.0, 1.23841 604.8, 1.23808 604.1, 1.23786 602.9, 1.23733 601.7, 1.23715 600.5, 1.23756 599.3, 1.23781 598.1, 1.23729 596.9, 1.23779 595.7, 1.23704 594.6, 1.23683 593.4, 1.23620 592.2, 1.23561 591.0, 1.23541 589.8, 1.23447 588.6, 1.23371 587.4, 1.23330 586.2, 1.23190 585.0, 1.23042 583.8, 1.22890 582.6, 1.22787 581.4, 1.22670 580.2, 1.22490 579.1, 1.22263 577.9, 1.22017 576.7, 1.21840 575.5, 1.21616 574.3, 1.21356 573.1, 1.21040 571.9, 1.20749 570.7, 1.20421 569.5, 1.20026 568.3, 1.19653 567.1, 1.19248 565.9, 1.18829 564.7, 1.18463 563.6, 1.17971 562.4, 1.17501 561.2, 1.17008 560.0, 1.16510 558.8, 1.15927 557.6, 1.15342 556.4, 1.14753 555.2, 1.14143 554.0, 1.13455 552.8, 1.12854 551.6, 1.12161 550.4, 1.11488 549.2, 1.10766 548.1, 1.10006 546.9, 1.09211 545.7, 1.08419 544.5, 1.07646 543.3, 1.06804 542.1, 1.05946 540.9, 1.05060 539.7, 1.04216 538.5, 1.03259 537.3, 1.02415 536.1, 1.01501 534.9, 1.00591 533.7, 0.99631 532.5, 0.98651 531.3, 0.97655 530.2, 0.96676 529.0, 0.95706 527.8, 0.94695 526.6, 0.93673 525.4, 0.92658 524.2, 0.91597 523.0, 0.90544 521.8, 0.89529 520.6, 0.88505 519.4, 0.87426 518.2, 0.86369 517.0, 0.85309 515.8, 0.84275 514.6, 0.83234 513.5, 0.82102 512.3, 0.81066 511.1, 0.80045 509.9, 0.78948 508.7, 0.77890 507.5, 0.76883 506.3, 0.75835 505.1, 0.74823 503.9, 0.73845 502.7, 0.72862 501.5, 0.71902 500.3, 0.70925 499.1, 0.69990 497.9, 0.69133 496.7, 0.68220 495.5, 0.67397 494.4, 0.66600 493.2, 0.65774 492.0, 0.65026 490.8, 0.64319 489.6, 0.63668 488.4, 0.63040 487.2, 0.62523 486.0, 0.62095 484.8, 0.61731 483.6, 0.61454 482.4, 0.61360 481.2, 0.61391 480.0, 0.61594 478.8, 0.62024 477.6, 0.62667 476.4, 0.63557 475.3, 0.64648 474.1, 0.65892 472.9, 0.67245 471.7, 0.68363 470.5, 0.68871 469.3, 0.68841 468.1, 0.69126 466.9, 0.70114 465.7, 0.71672 464.5, 0.73625 463.3, 0.75926 462.1, 0.78217 460.9, 0.80208 459.7, 0.81594 458.5, 0.82675 457.3, 0.83831 456.1, 0.85470 454.9, 0.87618 453.8, 0.90291 452.6, 0.93203 451.4, 0.94772 450.2, 0.91996 449.0, 0.86890 447.8, 0.82725 446.6, 0.79741 445.4, 0.77235 444.2, 0.74841 443.0, 0.72347 441.8, 0.69856 440.6, 0.67409 439.4, 0.65080 438.2, 0.62922 437.0, 0.60888 435.8, 0.59093 434.6, 0.57615 433.4, 0.56320 432.3, 0.55164 431.1, 0.54173 429.9, 0.53376 428.7, 0.52678 427.5, 0.52110 426.3, 0.51636 425.1, 0.51301 423.9, 0.50963 422.7, 0.50770 421.5, 0.50587 420.3, 0.50517 419.1, 0.50457 417.9, 0.50469 416.7, 0.50521 415.5, 0.50652 414.3, 0.50807 413.1, 0.51096 411.9, 0.51421 410.7, 0.51907 409.5, 0.52500 408.4, 0.53322 407.2, 0.54329 406.0, 0.55675 404.8, 0.57302 403.6, 0.59338 402.4, 0.61639 401.2, 0.64659 400.0, 0.68340 398.8, 0.73089 397.6, 0.79144 396.4, 0.86449 395.2, 0.95265 394.0, 1.05080 392.8, 1.11832 391.6, 1.20499 390.4, 1.32524 389.2, 1.43910 388.0, 1.44669 386.8, 1.41828 385.6, 1.38460 384.4, 1.37964 383.2, 1.39362 382.1, 1.40952 380.9, 1.41954 379.7, 1.45816 378.5, 1.47414 377.3, 1.47229 376.1, 1.39132 374.9, 1.26919 373.7, 1.16734 372.5, 1.13512 371.3, 1.11811 370.1, 1.12020 368.9, 1.12022 367.7, 1.12598 366.5, 1.12741 365.3, 1.13110 364.1, 1.14134 362.9, 1.16249 361.7, 1.20809 360.5, 1.27208 359.3, 1.30656 358.1, 1.38162 356.9, 1.43151 355.7, 1.50849 354.5, 1.58164 353.3, 1.63920 352.2, 1.68742 351.0, 1.72309