636:
1324:
662:, the most distinguishing features of pyrope are those shared with the other common garnets: high relief and isotropy. Garnets tend to be less strongly coloured than other silicate minerals in thin section, although pyrope may show a pale pinkish purple hue in plane-polarized light. The lack of cleavage, commonly euhedral crystal morphology, and mineral associations should also be used in identification of pyrope under the microscope.
1312:
50:
643:
In hand specimens, pyrope is very tricky to distinguish from almandine; however, it is likely to display fewer flaws and inclusions. Other distinguishing criteria are listed in the adjacent table. Care should be taken when using these properties as many of those listed have been determined from
614:
content of 3–8%, which imparts a distinctive violet to deep purple coloration (often with a greenish tinge) and because of this is often used as a kimberlite indicator mineral in areas where erosive activity makes pinpointing the origin of the pipe difficult. These varieties are known as
578:
processes. Pyrope also occurs in ultrahigh-pressure (UHP) metamorphic rocks, as in the Dora-Maira massif in the western Alps. In that massif, nearly pure pyrope occurs in crystals to almost 12 cm (5 in) in diameter; some of that pyrope has inclusions of
644:
synthetically grown, pure-composition pyrope. Others, such as pyrope's high specific gravity, may be of little use when studying a small crystal embedded in a matrix of other silicate minerals. In these cases, mineral association with other
545:
essartine). Iron and manganese substitute for the magnesium in the pyrope structure. The resultant, mixed composition garnets are defined according to their pyrope-almandine ratio. The semi-precious stone
419:
group. Pyrope is the only member of the garnet family to always display red colouration in natural samples, and it is from this characteristic that it gets its name: from the Greek words for
635:
180:
Blood red to black red, red, orange red, pink, some varieties are very dark, almost black, while others can take tones of purple to purple red, Some
1375:
793:
753:
444:
111:
726:
236:
764:
1315:
1284:
499:, although typically other elements are present in at least minor proportions—these other elements include
1355:
1350:
529:
209:
are not uncommon, and hexoctahedra are seen in some rare samples. Massive and granular forms also occur.
1360:
1299:
1294:
1370:
786:
350:
101:
355:
broad band at 564 nm with cutoff at 440 to 445 nm. Fine gem quality pyropes may show
1365:
923:
748:(Gia), Gemological. Gem Reference Guide. City: Gemological Institute of America (GIA), 1988.
224:
691:
202:
126:
8:
259:
249:
229:
695:
19:
This article is about the mineral. For the bird sometimes placed in the monotypic genus
1222:
779:
709:
214:
857:
749:
713:
567:
370:
1289:
945:
928:
699:
575:
304:
269:
72:
24:
880:
1328:
1177:
852:
652:
minerals may be the best indication that the garnet you are studying is pyrope.
1185:
1022:
516:
144:
121:
1344:
1217:
314:
206:
193:
185:
133:
34:
1128:
862:
443:
are two alternative names, the usage of the latter being discouraged by the
1263:
1249:
1245:
1232:
1132:
1083:
828:
659:
340:
65:
1089:
1000:
900:
656:
524:
337:
327:
156:
704:
679:
1237:
1211:
969:
963:
649:
599:
595:
588:
563:
559:
388:
364:
1240:
1190:
1122:
1117:
1074:
1028:
1008:
1004:
905:
890:
885:
817:
584:
547:
520:
512:
29:
606:-bearing. Pyrope found in association with diamond commonly has a Cr
1259:
1227:
1206:
1152:
1140:
1094:
1069:
1059:
1017:
979:
802:
504:
432:
428:
427:. Despite being less common than most garnets, it is a widely used
384:
356:
319:
198:
181:
1253:
1180:
1064:
991:
940:
847:
837:
603:
580:
571:
500:
396:
392:
380:
811:
Gemmological classifications by E. Ya. Kievlenko (1980), updated
49:
1172:
1135:
996:
895:
416:
1112:
1079:
985:
975:
934:
645:
570:: these mantle-derived peridotites can be attributed both to
771:
1267:
1201:
1194:
1146:
842:
508:
299:
Single refractive, often anomalous double refractive
431:with numerous alternative names, some of which are
1342:
309:1.74 normal, but ranges from 1.714 to over 1.742
787:
1311:
794:
780:
48:
703:
630:
634:
550:is a garnet of ~70% pyrope composition.
322:, appears black in cross-polarized light
1343:
527:, which are collectively known as the
369:Insoluble in water, weakly soluble in
775:
744:
742:
740:
738:
736:
734:
727:Thermochromic Cr-rich Pyrope Garnets
680:"IMA–CNMNC approved mineral symbols"
677:
483:The composition of pure pyrope is Mg
359:lines in the red end of the spectrum
13:
731:
14:
1387:
1322:
1310:
558:The origin of most pyrope is in
445:Gemological Institute of America
924:Yellow, Green, Violet Sapphires
553:
758:
720:
671:
478:
1:
801:
665:
583:, and some has inclusions of
188:, becoming green when heated.
1316:List of gemstones by species
1285:List of individual gemstones
946:Precious White and Fire Opal
7:
1376:Minerals in space group 230
16:Mineral of the garnet group
10:
1392:
18:
1308:
1300:List of sapphires by size
1277:
1165:
1103:
1050:
1041:
954:
914:
871:
826:
816:
809:
602:pipes, some of which are
402:
376:
363:
349:
336:
326:
313:
303:
295:
287:
268:
258:
248:
235:
223:
213:
192:
176:
171:
155:
132:
120:
110:
100:
71:
61:
56:
47:
42:
1295:List of emeralds by size
684:Mineralogical Magazine
640:
631:Mineral identification
863:Natural marine pearls
638:
112:Strunz classification
982:, pink, yellow-green
678:Warr, L. N. (2021).
594:Pyrope is common in
447:. Misnomers include
203:rhombic dodecahedral
1329:Minerals portal
901:Precious Black Opal
705:10.1180/mgm.2021.43
696:2021MinM...85..291W
461:Rocky Mountain ruby
415:is a member of the
377:Mineral association
1356:Aluminium minerals
1351:Magnesium minerals
1151:Opaque iridescent
1042:Jewelry-Industrial
988:yellow, blue, pink
641:
469:Bohemian carbuncle
351:Absorption spectra
296:Optical properties
254:greasy to vitreous
201:typically display
184:-rich pyropes are
1338:
1337:
1166:Industrial stones
1161:
1160:
1037:
1036:
639:Pyrope aggregate.
562:rocks, typically
515:. Pyrope forms a
409:
408:
1383:
1361:Garnet gemstones
1327:
1326:
1325:
1314:
1313:
1290:List of diamonds
1048:
1047:
824:
823:
796:
789:
782:
773:
772:
767:
762:
756:
746:
729:
724:
718:
717:
707:
675:
305:Refractive index
283:
282:
281:
270:Specific gravity
241:
166:
150:
141:
138:Hexoctahedral (m
78:
77:(repeating unit)
52:
40:
39:
25:Fire-eyed diucon
1391:
1390:
1386:
1385:
1384:
1382:
1381:
1380:
1341:
1340:
1339:
1334:
1323:
1321:
1304:
1273:
1157:
1099:
1043:
1033:
950:
910:
867:
812:
805:
800:
770:
765:Mineralienatlas
763:
759:
747:
732:
725:
721:
676:
672:
668:
633:
613:
609:
598:xenoliths from
556:
498:
494:
490:
486:
481:
457:California ruby
441:Bohemian garnet
279:
277:
276:
274:
239:
164:
148:
143:
139:
96:
92:
88:
84:
76:
75:
38:
33:character, see
17:
12:
11:
5:
1389:
1379:
1378:
1373:
1371:Cubic minerals
1368:
1363:
1358:
1353:
1336:
1335:
1333:
1332:
1309:
1306:
1305:
1303:
1302:
1297:
1292:
1287:
1281:
1279:
1275:
1274:
1272:
1271:
1257:
1243:
1235:
1230:
1225:
1220:
1215:
1209:
1204:
1198:
1188:
1186:Petrified wood
1183:
1175:
1169:
1167:
1163:
1162:
1159:
1158:
1156:
1155:
1149:
1143:
1138:
1125:
1120:
1115:
1109:
1107:
1101:
1100:
1098:
1097:
1092:
1087:
1077:
1072:
1067:
1062:
1056:
1054:
1045:
1039:
1038:
1035:
1034:
1032:
1031:
1025:
1020:
1015:
994:
989:
983:
973:
972:, polychromous
967:
960:
958:
952:
951:
949:
948:
943:
938:
931:
926:
920:
918:
912:
911:
909:
908:
903:
898:
893:
888:
883:
877:
875:
869:
868:
866:
865:
860:
855:
850:
845:
840:
834:
832:
821:
814:
813:
810:
807:
806:
799:
798:
791:
784:
776:
769:
768:
757:
730:
719:
690:(3): 291–320.
669:
667:
664:
632:
629:
611:
607:
568:Earth's mantle
555:
552:
517:solid solution
496:
492:
488:
484:
480:
477:
407:
406:
404:
400:
399:
378:
374:
373:
367:
361:
360:
353:
347:
346:
343:
334:
333:
330:
324:
323:
317:
311:
310:
307:
301:
300:
297:
293:
292:
289:
285:
284:
272:
266:
265:
262:
256:
255:
252:
246:
245:
242:
233:
232:
227:
221:
220:
217:
211:
210:
196:
190:
189:
178:
174:
173:
172:Identification
169:
168:
159:
153:
152:
136:
130:
129:
124:
122:Crystal system
118:
117:
114:
108:
107:
104:
98:
97:
94:
90:
86:
82:
79:
69:
68:
63:
59:
58:
54:
53:
45:
44:
15:
9:
6:
4:
3:
2:
1388:
1377:
1374:
1372:
1369:
1367:
1364:
1362:
1359:
1357:
1354:
1352:
1349:
1348:
1346:
1331:
1330:
1319:
1318:
1317:
1307:
1301:
1298:
1296:
1293:
1291:
1288:
1286:
1283:
1282:
1280:
1276:
1269:
1265:
1261:
1258:
1255:
1251:
1247:
1244:
1242:
1239:
1236:
1234:
1231:
1229:
1226:
1224:
1221:
1219:
1216:
1213:
1210:
1208:
1205:
1203:
1199:
1196:
1192:
1189:
1187:
1184:
1182:
1179:
1176:
1174:
1171:
1170:
1168:
1164:
1154:
1150:
1148:
1144:
1142:
1139:
1137:
1134:
1130:
1126:
1124:
1121:
1119:
1116:
1114:
1111:
1110:
1108:
1106:
1102:
1096:
1093:
1091:
1088:
1085:
1081:
1078:
1076:
1073:
1071:
1068:
1066:
1063:
1061:
1058:
1057:
1055:
1053:
1049:
1046:
1040:
1030:
1026:
1024:
1021:
1019:
1016:
1014:
1010:
1006:
1002:
998:
995:
993:
990:
987:
984:
981:
977:
974:
971:
968:
965:
962:
961:
959:
957:
953:
947:
944:
942:
939:
936:
932:
930:
927:
925:
922:
921:
919:
917:
913:
907:
904:
902:
899:
897:
894:
892:
889:
887:
884:
882:
881:Pink sapphire
879:
878:
876:
874:
870:
864:
861:
859:
856:
854:
853:Blue Sapphire
851:
849:
846:
844:
841:
839:
836:
835:
833:
831:
830:
825:
822:
819:
815:
808:
804:
797:
792:
790:
785:
783:
778:
777:
774:
766:
761:
755:
754:0-87311-019-6
751:
745:
743:
741:
739:
737:
735:
728:
723:
715:
711:
706:
701:
697:
693:
689:
685:
681:
674:
670:
663:
661:
658:
653:
651:
647:
637:
628:
626:
622:
618:
617:chrome-pyrope
605:
601:
597:
592:
590:
586:
582:
577:
573:
569:
565:
561:
551:
549:
544:
540:
536:
532:
531:
526:
522:
518:
514:
510:
506:
502:
476:
474:
470:
466:
462:
458:
454:
450:
449:Colorado ruby
446:
442:
438:
437:Chrome pyrope
434:
430:
426:
422:
418:
414:
405:
401:
398:
394:
390:
386:
382:
379:
375:
372:
368:
366:
362:
358:
354:
352:
348:
344:
342:
339:
335:
331:
329:
325:
321:
318:
316:
315:Birefringence
312:
308:
306:
302:
298:
294:
290:
288:Polish luster
286:
273:
271:
267:
263:
261:
257:
253:
251:
247:
243:
238:
234:
231:
228:
226:
222:
218:
216:
212:
208:
204:
200:
197:
195:
194:Crystal habit
191:
187:
186:thermochromic
183:
179:
175:
170:
163:
160:
158:
154:
146:
137:
135:
134:Crystal class
131:
128:
125:
123:
119:
115:
113:
109:
105:
103:
99:
80:
74:
70:
67:
64:
60:
55:
51:
46:
41:
36:
35:Terezi Pyrope
32:
31:
26:
22:
1366:Garnet group
1320:
1264:Pyrophyllite
1233:Serpentinite
1214:(green mica)
1104:
1084:Baltic amber
1051:
1012:
955:
915:
872:
827:
760:
722:
687:
683:
673:
660:thin section
657:petrographic
654:
642:
624:
620:
616:
593:
557:
554:Distribution
542:
538:
534:
528:
519:series with
482:
472:
468:
464:
460:
456:
453:Arizona ruby
452:
448:
440:
436:
424:
420:
412:
411:The mineral
410:
341:fluorescence
207:trapezohedra
161:
66:Nesosilicate
28:
20:
1246:Ophicalcite
1127:Colorless,
1090:Chrysoprase
1001:Spessartine
966:– Verdelite
858:Alexandrite
576:metamorphic
525:spessartine
479:Composition
338:Ultraviolet
328:Pleochroism
157:Space group
1345:Categories
1250:Serpentine
1238:Aventurine
1212:Listwanite
1003:(malaya),
970:Indicolite
964:Tourmaline
937:(Imperial)
929:Aquamarine
666:References
650:ultramafic
600:kimberlite
596:peridotite
589:sapphirine
564:peridotite
560:ultramafic
530:pyralspite
403:References
389:hornblende
365:Solubility
237:Mohs scale
230:Conchoidal
205:form, but
145:H–M symbol
102:IMA symbol
27:. For the
1241:quartzite
1193:(Porouse
1191:Cacholong
1153:feldspars
1123:Rhodonite
1118:Amazonite
1105:2nd order
1075:Malachite
1052:1st order
1029:Turquoise
1009:Almandine
1005:Rhodolite
956:4th order
916:3rd order
906:Tanzanite
891:Tsavorite
886:Demantoid
873:2nd order
829:1st order
803:Gemstones
714:235729616
627:garnets.
585:enstatite
566:from the
548:rhodolite
541:mandine,
533:garnets (
521:almandine
473:Cape ruby
465:Elie Ruby
433:misnomers
320:Isotropic
30:Homestuck
1260:Pagodite
1228:Fluorite
1223:Selenite
1207:Obsidian
1141:Hematite
1095:Charoite
1070:Nephrite
1060:Lazurite
1018:Amethyst
980:Heliodor
429:gemstone
385:pyroxene
357:chromium
291:vitreous
240:hardness
225:Fracture
215:Cleavage
182:chromium
62:Category
1278:Related
1254:Calcite
1200:Marble
1181:granite
1178:Graphic
1145:Common
1065:Jadeite
1023:Citrine
997:Garnets
992:Peridot
941:Elbaite
933:Orange
848:Emerald
838:Diamond
818:Jewelry
692:Bibcode
604:diamond
581:coesite
572:igneous
397:diamond
393:biotite
381:Olivine
244:7.0–7.5
199:Euhedra
147:: (4/m
116:9.AD.25
73:Formula
57:General
1173:Jasper
1136:quartz
1044:stones
1013:Pyrope
896:Spinel
820:stones
752:
712:
471:, and
439:, and
417:garnet
413:pyrope
260:Streak
250:Luster
43:Pyrope
23:, see
21:Pyrope
1129:smoky
1113:Agate
1080:Amber
1027:Blue
986:Topaz
976:Beryl
935:topaz
710:S2CID
646:mafic
619:, or
537:ope,
345:inert
280:−0.16
278:+0.09
264:White
177:Color
127:Cubic
1268:Talc
1202:onyx
1195:opal
1147:opal
1133:pink
1131:and
843:Ruby
750:ISBN
648:and
587:and
574:and
523:and
511:and
491:(SiO
423:and
421:fire
332:none
275:3.78
219:None
151:2/m)
89:(SiO
1218:Jet
700:doi
655:In
625:G10
535:pyr
425:eye
142:m)
106:Prp
1347::
1011:,
1007:,
999:–
978:–
733:^
708:.
698:.
688:85
686:.
682:.
621:G9
591:.
543:sp
539:al
513:Mn
509:Fe
507:,
505:Cr
503:,
501:Ca
487:Al
475:.
467:,
463:,
459:,
455:,
451:,
435:.
395:,
391:,
387:,
383:,
371:HF
162:Ia
85:Al
81:Mg
1270:)
1266:/
1262:(
1256:)
1252:/
1248:(
1197:)
1086:)
1082:(
795:e
788:t
781:v
716:.
702::
694::
623:/
612:3
610:O
608:2
497:3
495:)
493:4
489:2
485:3
167:d
165:3
149:3
140:3
95:3
93:)
91:4
87:2
83:3
37:.
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