Question: What state did the radium come from that was used in glow-in-the-dark radioactive paint between 1917 and 1926?

Context paragraphs:
Radium Dial Company: The Radium Dial Company, was one of a few now defunct United States companies along with the United States Radium Corporation, involved in the painting of clocks, watches and other instrument dials using radioluminescent paint containing radium.  The resulting dials are now collectively known as radium dials.  The luminous paint used on the dials contained a mixture of phosphorus and radium, a product that the Radium Dial Company named "Luna".  However, unlike the US Radium Corporation, Radium Dial Company was specifically set up to only paint dials, no other radium processing took place at the premises.

Artificial disintegration: Artificial disintegration is the term coined by Ernest Rutherford for the process by which an atomic nucleus is broken down by bombarding it with high speed alpha particles, either from a particle accelerator, or a naturally decaying radioactive substance such as radium, as Rutherford originally used.

War Paint (1926 film): War Paint is a 1926 Western film directed by W. S. Van Dyke.  The film stars Tim McCoy.  Louis B. Mayer observed the profits made by other studios with western franchises such as Tom Mix, Buck Jones or Hoot Gibson.  He selected a genuine army officer who had lived with Indian tribes to come to Hollywood as an advisor on 1922's "The Covered Wagon": Colonel Timothy John Fitzgerald McCoy.  His debut as Tim McCoy in "War Paint" was announced under the banner "He's the real McCoy!"  In order to maximize the economics, the film was shot simultaneously on location with another film, "Winners of the Wilderness".  The film is considered lost.  A trailer however is preserved at the Library of Congress.

Scheelite: Scheelite is a calcium tungstate mineral with the chemical formula CaWO.  It is an important ore of tungsten (wolfram).  Well-formed crystals are sought by collectors and are occasionally fashioned into gemstones when suitably free of flaws.  Scheelite has been synthesized using the Czochralski process; the material produced may be used to imitate diamond, as a scintillator, or as a solid-state lasing medium.  It was also used in radium paint in the same fashion as was zinc sulphide, and Thomas Edison invented a fluoroscope with a calcium tungstate-coated screen, making the images six times brighter that those with barium platinocyanide; the latter chemical allowed Röntgen to discover X-rays in early November 1895.

Standard Chemical Company: The now defunct Standard Chemical Company (SCC) of Canonsburg, Pennsylvania, was the first successful commercial producer of radium.  SCC operated the radium refining mill from 1911 to 1922 on a 19-acre (77,000 m2) plot of land.  The company supplied radium to the United States Radium Corporation for use in their watch dials.

Undark: Undark was a trade name for luminous paint made with a mixture of radioactive radium and zinc sulfide, as produced by the U.S. Radium Corporation between 1917 and 1938.  It was used primarily in watch and clock dials.  The people working in the industry who applied the radioactive paint became known as the Radium Girls, because many of them became ill and some died from exposure to the radiation emitted by the radium contained within the product.  The product was the direct cause of Radium jaw in the dial painters.  Undark was also available as a kit for general consumer use and marketed as glow-in-the-dark paint.

Francium: Francium is a chemical element with symbol Fr and atomic number 87.  It used to be known as eka-caesium and actinium K.  It is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine).  Francium is a highly radioactive metal that decays into astatine, radium, and radon.  As an alkali metal, it has one valence electron.

Radium Girls: The Radium Girls were female factory workers who contracted radiation poisoning from painting watch dials with self-luminous paint.  Painting was done by women at three different sites in the United States, and the term now applies to the women working at the facilities.  The first, United States Radium factory in Orange, New Jersey, beginning around 1917, at Ottawa, Illinois, beginning in the early 1920s, and a third facility in Waterbury, Connecticut.

Radium chloride: Radium chloride (RaCl) is a chemical compound of radium and chlorine, and the first radium compound isolated in a pure state.  Marie Curie and André-Louis Debierne used it in their original separation of radium from barium.  The first preparation of radium metal was by the electrolysis of a solution of this salt using a mercury cathode.

United States Radium Corporation: The United States Radium Corporation was a company, most notorious for its operations between the years 1917 to 1926 in Orange, New Jersey, in the United States that led to stronger worker protection laws.  After initial success in developing a glow-in-the-dark radioactive paint, the company was subject to several lawsuits in the late 1920s in the wake of severe illnesses and deaths of workers (the Radium Girls) who had ingested radioactive material.  The workers had been told that the paint was harmless.  During World War I and World War II, the company produced luminous watches and gauges for the United States Army for use by soldiers.

Supporting paragraphs: Standard Chemical Company United States Radium Corporation
Answer: Pennsylvania