Skip To Content
Go to gemstones.com homepage
Recommended searches
Gemopedia
  • Ruby
  • Sapphire
  • Emerald
  • Moissanite
  • Diamond
  • Peridot
  • Opal
  • Tanzanite
  • All Gemstones in Gemopedia
Shop Gemstones
  • Shop Jedora Gemstones
  • Shop JTV Gemstones
Videos
  • Tourmaline Mining in Brazil
  • Freshwater Pearls vs. Saltwater Pearls
  • History of Birthstones
  • Design and Wax Carving
  • Ruby Gemstone Spotlight
  • Fun Facts about Diamonds
  • Going Down A Tanzanite Mine
  • Fun Facts About Sapphire
  • All Videos
Articles
  • Gemstone Collecting
  • Gemstone Beauty
  • Gemstone Color
  • Gemstone Origins
  • Optical Properties
  • Rare Gemstone Collecting
  • Gemstone Luster
  • Phenomenal Gemstones
  • All Articles
Showcase Collections
  • Quartz Gemstones
  • Organic Gemstones
  • American Gemstones
  • Birthstones
  • Mineral Specimens
  • Colors of Tourmaline
  • All Showcases
Gemstone Discovery App
  • Download the App
About Us
  • About Us
Feedback
  • Survey
  • Gemstones Home
  • Gemopedia
  • Rock

Rock

Rock

By Tim Matthews, JD, FGA, GG, DGA,
CEO and President of JTV
Published: June 2014
Modified: April 2022
Rock Polished Rock Rough Rock Jewelry
Table of Contents
  • General Information
  • Rock Colors
  • Alternate Names
  • Countries of Origin
  • Species/Variety

Rock describes an inorganic material that is an aggregate, or mixture, of minerals. Rocks are igneous, metamorphic, sedimentary or in rare cases extraterrestrial (meteorites and some tektites).

General Information

  • Classification
  • Optical Properties
  • Characteristic Physical Properties
  • Chemistry & Crystallography
Common Name
Rock
Species
Rock
Transparency
Opaque-Translucent
Optic Character
NA
Optic Sign
NA
Polariscope Reaction
Aggregate (AGG)
Pleochroism
None
Luster
Dull, Resinous, Vitreous, Submetallic, Silky, Pearly, Metallic, Greasy
Chemistry Classification
Rock

Rock Colors

  • Bi-color Rock
    Bi-color
  • Yellow Rock
    Yellow
  • White Rock
    White
  • Red Rock
    Red
  • Purple Rock
    Purple
  • Pink Rock
    Pink
  • Orange Rock
    Orange
  • Multi-color Rock
    Multi-color
  • Green Rock
    Green
  • Gray Rock
    Gray
  • Brown Rock
    Brown
  • Blue Rock
    Blue
  • Black Rock
    Black

Alternate Names

Mixed Ornamental Stone

Countries of Origin

Niger (the); Papua New Guinea; Cambodia; Gambia (the); Kazakhstan; Paraguay; Solomon Islands; Montserrat; Unknown; Mali; Guadeloupe; Panama; Bonaire, Sint Eustatius and Saba; Argentina; Seychelles; Belize; Zambia; Bahrain; Guinea-Bissau; Saint Barthelemy; Namibia; Finland; Georgia; Yemen; Tanzania, United Republic Of; Eritrea; Puerto Rico; Viet Nam; Aruba; Madagascar; Libya; Sweden; Malawi; Andorra; Saint Helena, Ascension and Tristan da Cunha; Liechtenstein; Russian Federation (the); Poland; Bulgaria; Jordan; United States Minor Outlying Islands (the); Tunisia; Tuvalu; Kenya; French Polynesia; Djibouti; Lebanon; Azerbaijan; Cuba; Mauritania; Saint Lucia; Guernsey; Congo (the Democratic Republic of the); Mayotte; Israel; San Marino; Australia; Tajikistan; Myanmar; Cameroon; Gibraltar; Cyprus; Malaysia; Iceland; Oman; Bosnia And Herzegovina; Armenia; Gabon; Korea (the Republic of); Luxembourg; Brazil; Algeria; Cabo Verde; Jersey; Slovenia; Colombia; Ecuador; Iran (Islamic Republic of); United States of America (the); Vanuatu; Honduras; Italy; Antarctica; Turks and Caicos Islands (the); Nauru; Haiti; Afghanistan; Burundi; British Indian Ocean Territory (the); Singapore; French Guiana; American Samoa; Christmas Island; China; Martinique; Sudan (the); Kyrgyzstan; Comoros (the); United Kingdom of Great Britain and Northern Ireland (the); Reunion; Saint Pierre And Miquelon; Cote D'Ivoire; Bhutan; Multiple; Romania; Togo; Cocos (Keeling) Islands (the); Dominican Republic (the); Uzbekistan; Holy See (the); Netherlands (the); Pitcairn; Zimbabwe; Montenegro; Dominica; Indonesia; Benin; Angola; Virgin Islands (British); Brunei Darussalam; Portugal; New Caledonia; Grenada; Moldova (the Republic of); Greece; Latvia; Mongolia; Morocco; Guatemala; Guyana; Iraq; Chile; Nepal; Cayman Islands (the); Isle of Man; Ukraine; Ghana; Anguilla; Saint Vincent And The Grenadines; India; Canada; Maldives; Turkey; Belgium; Faroe Islands (the); South Africa; Bermuda; Aland Islands; Jamaica; Peru; Turkmenistan; Venezuela (Bolivarian Republic of); Germany; United Arab Emirates (the); Fiji; Tokelau; Hong Kong; Guinea; Chad; Somalia; Thailand; Cook Islands (the); Equatorial Guinea; Kiribati; Costa Rica; Saint Martin (French part); Kuwait; Nigeria; Central African Republic (the); Palestine, State of; Croatia; Sao Tome And Principe; Syrian Arab Republic; Sri Lanka; Uruguay; Timor-Leste; Switzerland; Samoa; Spain; Liberia; Burkina Faso; Swaziland; Lao People's Democratic Republic (the); Palau; Estonia; Wallis and Futuna; Niue; Svalbard And Jan Mayen; Austria; Mozambique; El Salvador; Monaco; Guam; Lesotho; Tonga; Heard Island And Mcdonald Islands; Western Sahara; Hungary; Republic of Kosovo; South Sudan; Congo (the); Japan; Belarus; Curacao; Mauritius; Taiwan (Province of China); Bouvet Island; Albania; Bolivia (Plurinational State of); Norfolk Island; Trinidad And Tobago; Virgin Islands (U.S.); New Zealand; Sint Maarten (Dutch part); Senegal; Micronesia (Federated States of); Ethiopia; Macedonia (the former Yugoslav Republic of); Czechia; Egypt; Falkland Islands (the) [Malvinas]; Marshall Islands (the); Sierra Leone; Malta; Saudi Arabia; South Georgia And The South Sandwich Islands; Pakistan; Ireland; Qatar; Slovakia; France; Lithuania; Serbia; Bahamas (the); French Southern Territories (the); Rwanda; Saint Kitts And Nevis; Bangladesh; Barbados; Nicaragua; Norway; Botswana; Macao; Denmark; Mexico; Northern Mariana Islands (the); Uganda; Suriname; Philippines (the); Greenland; Antigua And Barbuda

Species/Variety

Copper Porphyry or Peacock Rock

  • Classification
  • Optical Properties
  • Characteristic Physical properties
Common Name
Copper Porphyry or Peacock Rock
Refractive Index
Over The Limit 1.46-1.909
Fluorescence
SWUV: Inert
LWUV: Inert to weak greenish yellow
Specific Gravity
2
Stability
Poor

Jenekite

Jenekite is a trade name for an amphibole-rich metamorphic rock that is also called, Nuummite. Nuummite is named after its place of origin: Nuuk, Greenland. This rock is frequently polished en cabochon and produces an attractive iridescence caused by interlocking crystals of anthophyllite and gedrite.

  • Classification
  • Optical Properties
  • Characteristic Physical properties
Common Name
Jenekite
Refractive Index
1.649-1.669
Birefringence
.022
Fluorescence
SWUV: Inert
LWUV: Inert
Specific Gravity
2.93
Inclusions
Jenekite will contain Iridescent anthophyllite needles.

Eilat Stone

The rich greens of eilat stone comes from it being a unique combination of various copper-bearing minerals including chrysocolla, malachite, azurite and turquoise. This stone is the national stone of Israel and known as King Solomon stone, as it comes from what is storied as King Solomon's mines in the Timna Valley of Israel.

Eilat Stone Rock
Eilat Stone Rock
  • Classification
  • Optical Properties
  • Characteristic Physical properties
Common Name
Eilat Stone
Dispersion
Strength: none
Refractive Index
1.5-1.61
Birefringence
.025
Fluorescence
SWUV: Inert
LWUV: Inert
Specific Gravity
2.8
Inclusions
Eilat stone has a variegated and mottled appearance.
Instagram
Facebook
YouTube
  • About Us
  • Terms & Conditions
  • Privacy Policy
  • Sitemap
  • Contact Us
  • Request a Partner Invitation

©  America's Collectibles Network, Inc. All Rights Reserved.