A
- Abalone Pearl
- Abalone Shell
- Acanthite
- Achroite
- Actinolite
- Adamite
- Adelaide Ruby
- Adularia
- Aegirine
- Afghanite
- African Emerald
- African Jade
- Agate
- Agate Geode
- Agate Jasper
- Agatized Coral
- Ajoite
- Akoya Pearl
- Alabandite
- Alamosite
- Albite
- Alexandrine
- Alexandrite
- Almandine Garnet
- Almandine Spinel
- Amatrix
- Amazonite
- Amber
- Amberoid
- Amethyst
- Ametrine
- Ammolite
- Ammonite
- Amorite
- Amphibole
- Anabergite
- Analcime
- Anatase
- Andalusite
- Andesine
- Andesine-Labradorite
- Angelite
- Anglesite
- Anhydrite
- Ankerite
- Anorthite
- Anorthite
- Anorthosite
- Anyolite
- Apache Tears
- Apatite
- Apophyllite
- Aqualite
- Aquamarine
- Aragonite
- Arizona Tiger's Eye
- Arkansas Diamond
- Arsenopyrite
- Arthurite
- Astrophyllite
- Augelite
- Augite
- Aura Quartz
- Auralite 23
- Aurichalcite
- Austinite
- Australian Sapphire
- Aventurine
- Axinite
- Azotic Topaz
- Azure-Malachite
- Azurite
B
- Babingtonite
- Bahia Blue Quartz
- Balas Ruby
- Baltic Amber
- Banded Agate
- Banded Opal
- Barite
- Barstowite
- Bauxite
- Bavenite
- Beryl
- Bi-Color Sapphire
- Biggs Jasper
- Bikitaite
- Binghamite
- Biotite
- Biron Emerald
- Bismoclite
- Bismuth
- Black Agate
- Black Coral
- Black Obsidian
- Black Onyx
- Black Opal
- Black Pearl
- Blood Jasper
- Bloodstone
- Blue Agate
- Blue Alexandrite
- Blue Amber
- Blue Apatite
- Blue Calcite
- Blue John
- Blue Kunzite
- Blue Lace Agate
- Blue Quartz
- Blue Sapphire
- Blue Spinel
- Blue Tiger's Eye
- Blue Topaz
- Boehmite
- Bohemian Emerald
- Boji Stone
- Boleite
- Bone Turquoise
- Bony Amber
- Bornite
- Bort
- Botswana Agate
- Boulder Opal
- Brazilian Aquamarine
- Brazilian Emerald
- Brecciated Agate
- Brecciated Jasper
- Brewsterite
- Bristol Diamond
- Brochantite
- Bronzite
- Brookite
- Brown Jasper
- Bruneau Jasper
- Buergerite
- Bullseye Agate
- Bumblebee Jasper
- Burkeite
- Burmese Ruby
- Burmese Sapphire
- Burmite
- Bustamite
- Bytownite
C
- Cacoxenite
- Cairngorm
- Calcite
- Caledonite
- Calligraphy Jasper
- Canary Diamond
- Canary Tourmaline
- Cape May Diamond
- Carnelian
- Carnelian Agate
- Cascading Quartz
- Cassiterite
- Cat's Eye
- Cat's Eye Aquamarine
- Cat's Eye Emerald
- Cat's Eye Moonstone
- Cat's Eye Quartz
- Cat's Eye Tourmaline
- Cavansite
- Celestite
- Ceylon Sapphire
- Chalcanthite
- Chalcedony
- Chalcocite
- Chalcopyrite
- Charoite
- Cherry Opal
- Cherry Quartz
- Chevron Amethyst
- Chiastolite
- Chiavennite
- Chlorite
- Chloromelanite
- Chondrodite
- Chrome Chalcedony
- Chrome Diopside
- Chrome Tourmaline
- Chromite
- Chrysanthemum Stone
- Chrysoberyl
- Chrysocolla
- Chrysomelanite
- Chrysopal
- Chrysoprase
- Cinnabar
- Citrine
- Clear Quartz
- Clinochlore
- Clinohumite
- Clinoptilolite
- Clinozoisite
- Colombian Emerald
- Color Change Garnet
- Columbite
- Condor Agate
- Confetti Sunstone
- Conichalcite
- Copal
- Coral
- Cornflower Blue Sapphire
- Corundum
- Crazy Lace Agate
- Creedite
- Cristobalite
- Crocidolite
- Crocoite
- Cryolite
- Cultured Pearl
- Cuprite