Mercurous chloride                                                                                                           Hardness 1-2

A secondary mercury mineral. Fl brick red. Occurs at El Doktor near Zimapan, Mexico.

At Terlingua, Texas it was found in the mercury mines associated with terlinguaite which fl yellow, and calcite which fl and ph blue.


Fluorescent Color

RED, PINK

Aluminum oxide                                                                                                                     Hardness 9

Red ruby and other corundum will often fl a deep red LW. This fl is usually brightest with a hot quartz (high pressure mercury arc) type of lamp. Synthetic ruby will also fl. Fl corundum is found in Madagasgar and Burma. In the United States red fl corundum is common in several localities of North Carolina and is also found in the limestones of northern New Jersey at Sparta, Newton and Ogdensburg.


A silicate of lithium and aluminum                                                                                      Hardness 6

This uncommon lithium mineral fl a beautiful cerise red SW. It is an alteration product of spodumene and is sometimes found retaining the spodumene crystal form. Often associated with petalite which may fl white, fl eucryptite is found at Bikita, South Rhodesia, Africa, the Etti mine, Keystone, South Dakota and the Parker mine, Stratford, New Hampshire. It was first noted as a spodumene alteration product at Branchville, Connecticut.


Calcium fluoride                                                                                                                     Hardness 4

Unusual dark purple fluorite crystals which fl a dark red in LW has been found at Mapimi, Dgo., Mexico.


Sodium chloride - common salt                                                                                          Hardness 2-3

When suitable activators are present, halite will fl a pink to bright orange-red color. Amboy, California is one well-known locality for halite crystals. In some cases beautiful fl crystallizations have formed on sage brush where well brines have been allowed to evaporate on the desert.


A silicate of aluminum, sodium and calcium                                                                    Hardness 5-6

Square prismatic scapolite crystals which fl red SW have been found in Quebec.


Fluorescent Color

RED, PINK

Magnesium aluminum oxide                                                                                                  Hardness 8

Occasionally spinel is found which fl brilliant red in LW. This fl seems more common in the red colored specimens. Spinel is distinguished from most other minerals by its hardness.


Calcium magnesium silicate                                                                                               Hardness 4-5

Tremolite which fl red in shades ranging from pink to a rich fire red have been found in the talc mines of the Talcville - Balmat area of New York state. The red fl material has often been found intergrown with tremolite that fl orange. These tremolites will fl both SW and LW. The red fl material is usually best LW while the orange fl tremolite is best SW.


Fluorescent Color

WHITE, CREAM


Calcium carbonate                                                                                                         Hardness 31/2-4

Aragonite, with the same composition as calcite. but with orthrhombic rather than hexagonal crystal form, fl in many of the same colors as do the various calcites. Aragonite forms under a much narrower range of temperature and pressure conditions than calcite and is far less common. Clusters of bright white fl (LW) aragonite crystal spikes have been found at San Luis . Obispo, California. Fl aragonite (SW) spikes have been found in traprock at Deerfield, Massachusetts. Specimens from both of these localities exhibit a brief greenish-white ph. Some of the aragonite crystals from the sulfur mines of Sicily fl pink LW and white SW.