0120-2804 0120-2804 S0120-28042021000300024 10.15446/rev.colomb.quirn.v50n3.98674 Colombia Colombia 00 12 2021 00 12 2021 50 3 24 31

[I] 1967 47 7 7 2220-8 [2] 1968 53 5/6 5/6 777-800 [3] 2015 Special Is 56-69 [4] 1996 81 395-403 [5] 2008 35 5 5 271-8 [6] 2014 140 22 22 [7] Gemological Institute of America 2021 [8] 2018 [9] 2009 5 3 3 159-62 [10] 1994 32 1 1 55-68 [11] 2014 50 4 4 287-92 [12] 2010 46 1 1 36-41 [13] 2014 50 2 2 114-32 [14] 2019 55 4 4 512-35 [15] 2019 55 4 4 614-46 [16] 2012 33 1 1 1-13 [17] 2004 29 4 4 215-27 [18] 1989 226-31 [19] 2014 6 9 9 2812-31 [20] 2022 13 [21] 2021 342 128350 [22] 2019 5 5 5 [23] 2017 132 [24] 2018 94 351-66 [25] 2021 36 3 3 518-27 [26] 2020 46 46 36-43 [27] R Core Team 2021 [28] RStudio Team 2021 [29] 2015 [30] 2010 64 9 9 1007-16 [31] 2008 28 1 1 1-18 [32] 2017 [33] 2020 198 [34] 2008 44 2 2 108-22 [35] 2019 9 9 9 [36] 2019 57 1 1 65-79 [37] 2019 [38] 2000 31 6 6 485-190