Maryland Minerals: D to L

This is the second part of  our  compendium for the Maryland Minerals website seeking to list all mineral species and varieties of species known to have occurred in  Maryland. As in the first A to C portion, the  name of any major mineral family to which a species or variety belongs appears in parenthesis next to the species/variety name. Duly noted on the list also are a relatively few questionable or unverified occurrences.  Also included and similarly noted are the names of  species that the I.M.A. has since discredited. Images of Maryland-collected specimens arranged by county for many of these species are at the website's  Maryland-collected minerals slideshow.

For nearly all of  information in this compendium, we are grateful to the following sources.

• Minerals of Maryland by Charles Ostrander and Walter E. Price, Jr.,  Natural History Society of Maryland, 1940
• Minerals of the Washington, D.C. Area by Lawrence R. Bernstein, Maryland Geological Survey, 1980
• Smithsonian National Museum of Natural History Database.
• Mindat

Continuing through the end of the alphabet, subsequent posts will cover the names of additional minerals that have been collected in Maryland.

Here is the list from D to F:

Deweylite

Dickite

Diopside
Dolomite
Dravite (member of Tourmaline Group)

Dumortierite

Electrum

Enstatite

Epidote (Member of Epidote Group)

Erythrite

Fibrolite (variety of Sillimanite)

Flint (variety of Quartz)
Fluorite
Fluorapatite

Franklinite

Fuchsite (var. of Muscovite, a member of Mica Group)

Gahnite

Galena

Garnierite

Genthite

Garnierite

Genthite 

Glauconite (member of Mica Group)

Glaucophane (member of Amphibole Group)

Goethite

Gold

Graphite

Grossular (member of Garnet Group)
Gymnite (see Deweylite)

Gypsum

Halite

Halloysite (member of Serpentine Group)

Harmotome (member of Zeolite Group)

Hematite

Hemimorphite

Hessonite (var. of Grossular, a member of Garnet Family

Heulandite (Member of Zeolite Group)

Hisingerite (?)

Hornblende
Huntite
Hyalite (synonym of Opal-AN)

Hydromagnesite

Hydrotalcite (member of hydtrotalcite group)
Hydrozincite

Hyspersthene (name discredited by IMA)

Ice

Iceland Spar (a distinct form of Calcite)
Idaite
Jarosite

Idocrase (synonym for Vesuvianite)

Ilmenite (member of Ilmenite Group)

Iron (in meteorites)

Jasper (var. of Chalcedony (var. of Quartz)

Jefferisite (synonym for Vermiculite)

Kammererite (synonym for Chromian Clinochlore)

Kaolinite

Kyanite

Labradorite (member of Feldspar Group)
Lanthanite

Laumontite (member of Zeolite Group)
Leucoxene

Limonite
Linarite

Linnaeite (member of Linnaeite Group)
Lipscombite
Ludjibaite