Related by context. Frequent words. (Click for all words.) 68 beryl 66 olivine 65 spinel 62 manganese oxide 61 garnets 61 iron oxides 61 chalcocite 61 nanosized 60 oxidised 60 MgO 60 chemically inert 59 monazite 59 perovskite 59 calcareous 59 nacre 59 copper oxides 59 apatite 59 siliceous 59 haematite 59 colloid 58 molybdenite 58 carbonaceous 58 malachite 58 aluminum oxide 58 clasts 58 sulphide minerals 58 Germanium 57 sericite 57 feldspar 57 graphitic 57 kimberlitic 57 pyroxenite 57 limonite 56 mica 56 copper ores 56 SiO 2 56 Chromite 56 hydroxyapatite 56 agglomerates 56 zircons 56 ZrO2 56 spodumene 56 nanocrystalline 56 tourmaline 56 nickel alloy 56 silicates 56 particle sizes 56 alluvial deposits 56 hematite 56 silicate 56 nanoclusters 56 calcium sulfate 55 alloyed 55 microstructures 55 biotite 55 anisotropic 55 polymerized 55 peridot 55 polycrystalline 55 porphyrin 55 titanium oxide 55 osmium 55 elemental composition 55 zeolites 55 calcite 55 caustic fusion 55 extractable 54 iron oxide 54 regolith 54 glacial till 54 crystalline structure 54 SiO2 54 sulfides 54 chlorite 54 lithologies 54 breccia pipes 54 isotope ratios 54 Al#O# 54 monolayer 54 europium 54 gravels 54 quartz crystals 54 lunar soil 54 jadeite 54 stromatolites 54 TiO 2 54 sintered 54 dopant 54 pink sapphire 53 Sulfide 53 basaltic 53 boron 53 Zirconium 53 basalts 53 supergene 53 patinas 53 monolayers 53 metallic minerals 53 porphyrins 53 semi precious stones 53 agglomerate