Mineral / Material	Density	Group
no guarantee	various sources
Magnesite	3.0
Malachite	4.05
Malaya Garnet	3.42 - 3.72	Garnet
Mali Garnet	3.42 - 3.72	Garnet
Mandarin Garnet	4.12 - 4.32	Garnet
Manganotantalite	6.65 - 8.1	Tantalite
Marialite	2.50 - 2.62
Meionite	2.74 - 2.78
Melanite	3.7 - 4.1	Garnet
Mellite	1.64 - 1.65
Microlite	5.90 - 6.43
Milarite	2.52 - 2.53
Mimetite	7.1 - 7.24
Moldavite	2.32 - 2.38
Monazite-(Ce)	4.98 - 5.43
Montebrasite	2.98 - 3.04
Moonstone	2.56 - 2.62	Feldspar
Morganite	2.6 - 2.9	Beryl
Mottramite	5.9
Musgravite	3.68
Nambulite	3.51
Narsarsukite	2.64 - 2.83
Natrolite	2.2 - 2.4
Nephrite	2.96 - 3.35
Neptunite	3.23
Nifontovite	2.35 - 2.36
Norbergite	3.14 - 3.18
Oligoclase	2.64 - 2.66	Feldspar
Olmiite	3.05
Opal	1.9 - 2.3
Orthoclase	2.56 - 2.59	Feldspar
Painite	4.0 - 4.03
Pargasite	3.069 - 3.181
Parisite-(Ce)	4.33 - 4.39
Pearls	2.65 - 2.78
Pectolite / Larimar	2.84 - 2.90
Peridot / Olivine	3.27 - 3.37
Peristerite	2.61 - 2.63	Feldspar
Petalite	2.39 - 2.46
Pezzottaite	2.97	Beryl
Phenakite	2.95 - 2.97
Phosgenite	6.12 - 6.15
Phosphophyllite	3.08 - 3.13
Phosphosiderite	2.74 - 2.76
Piemontite	3.46 - 3.54	Epidot
Poldervaartite	2.91
Pollucite	2.86 - 2.96
Poudretteite	2.48 - 2.50
Powellite	4.26
Prasiolite	2.65	Quartz
Prehnite	2.87 - 2.93
Prismatine	3.34 - 3.35
Pyromorphite	7.04
Pyrope	3.51 - 3.65	Garnet
Pyroxmangite	3.6 - 3.8
Red Beryl	2.67 - 2.75	Beryl
Remondite-(Ce)	3.43 - 3.50
Remondite-(La)	3.43
Rhodizite	3.44	Rhodizite
Rhodochrosite	3.3 - 3.7
Rhodolite	3.65 - 3.84	Garnet
Rhodonite	3.4 - 3.7
Richterite	2.9 - 3.3
Rock Crystal	2.65	Quartz
Rose Quartz	2.65	Quartz
Ruby	3.9 - 4.1	Corundum
Rutile	4.23 - 4.25