Exclusive: IGS Reveals the Most Popular Gemstone by State for 2023
Join us as we unveil the most coveted gemstones that have captured the hearts of residents in every corner of the United States.
| Alabama | Alexandrite |
| Alaska | Moonstone |
| Arizona | Alexandrite |
| Arkansas | Ruby |
| California | Ruby |
| Colorado | Ruby |
| Connecticut | Alexandrite |
| Delaware | Ruby |
| Florida | Alexandrite |
| Georgia | Alexandrite |
| Hawaii | Moonstone |
| Idaho | Alexandrite |
| Illinois | Ruby |
| Indiana | Ruby |
| Iowa | Moonstone |
| Kansas | Turquoise |
| Kentucky | Moonstone |
| Louisiana | Alexandrite |
| Maine | Moonstone |
| Maryland | Moonstone |
| Massachusetts | Alexandrite |
| Michigan | Ruby |
| Minnesota | Alexandrite |
| Mississippi | Emerald |
| Missouri | Alexandrite |
| Montana | Agate |
| Nebraska | Ruby |
| Nevada | Ruby |
| New Hampshire | Ruby |
| New Jersey | Ruby |
| New Mexico | Turquoise |
| New York | Ruby |
| North Carolina | Ruby |
| North Dakota | Ruby |
| Ohio | Alexandrite |
| Oklahoma | Alexandrite |
| Oregon | Sunstone |
| Pennsylvania | Ruby |
| Rhode Island | Moonstone |
| South Carolina | Moonstone |
| South Dakota | Turquoise |
| Tennessee | Alexandrite |
| Texas | Ruby |
| Utah | Ruby |
| Vermont | Charoite |
| Virginia | Alexandrite |
| Washington | Opal |
| West Virginia | Ruby |
| Wisconsin | Alexandrite |
| Wyoming | Agate |
Lisa Rosen
In 2012, Donald Clark retired and passed along stewardship of the IGS to the Rosen family, who were longtime members of IGS. Lisa Rosen runs the day-to-day operation of IGS and The Ganoksin Project, a technical resource website for bench jewelers and jewelry manufacturers. Lisa strongly believes that IGS must remain a cost-effective, accurate, and comprehensive resource for all those interested in gemology. IGS is our passion, and it is a family business.
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