Colorado Gem & Mineral Co. - Rocks for the Rest of Us

Assorted Gemstones


We have acess to GIA certified diamonds, at wholesale prices. Also we are able to get other stones from major dealers of Tanzanite, Emerald, Ruby, Chrysoberyl and Sapphires. After 30 years of being in business, we know how to get the best at prices that are actual wholesale including a commission to us.

For Amethyst and tourmaline, we have all sizes, colors, and shapes. Since we are cutters, we custom cut amethyst and other colored stones. Inquiries invited.


Ametrine ( Amethyst / Citrine ) - cushion

Ametrine ( Amethyst / Citrine ) - cushion

Well-cut Ametrine cushion with beautiful blend of purple and golden color.   17.81 carats Price ..

$356.00
Ametrine ( Amethyst / Citrine ) - octagon

Ametrine ( Amethyst / Citrine ) - octagon

Step cut octagon Ametrine with two sections of Citrine with a band of Amethyst in between.  Two..

$234.00
Apatite - drop

Apatite - drop

Nice green drop shape, excellent cutting this color is rare in Apatite.  Clean to the eye.  2.10 car..

$94.50
Aquamarine ( Beryl ) - cushion

Aquamarine ( Beryl ) - cushion

Sparkling step cut cushion Aquamarine, minor veils under 10x, 5.35 carats, $60/ct..

$321.00
Aquamarine ( Beryl ) - oval

Aquamarine ( Beryl ) - oval

Bright Aquamarine oval.   Great stone for a ring. Price is $70 / carat...

$168.00
Aquamarine ( Beryl ) - oval

Aquamarine ( Beryl ) - oval

Beautiful, step-cut Aquamarine oval with excellent clarity.   Price is $50 / carat...

$462.00
Aquamarine ( Beryl ) - oval

Aquamarine ( Beryl ) - oval

Very brilliant oval, clean.  $40/ct..

$132.00
Aquamarine ( Beryl ) - oval

Aquamarine ( Beryl ) - oval

Bright Aquamarine oval, well cut and good color.  3.52 carats $115/ct  We can set this as a ring or ..

$404.00
Aquamarine ( Beryl ) - oval

Aquamarine ( Beryl ) - oval

Sparkling eye clean Aquamarine, light blue, excellent cut.  4.32ct $90/ct..

$388.00
Aquamarine ( Beryl ) - oval

Aquamarine ( Beryl ) - oval

Bright oval, eye clean.  Great ring stone. Aquamarine has a hardness of 7.,5 to 8, and has no cleava..

$173.00
Aquamarine ( Beryl ) - trillion / cushion

Aquamarine ( Beryl ) - trillion / cushion

Brilliant triangle cushion Aquamarine with excellent color and classic step cut.  microscopic inclus..

$280.00
Baesnasite - cushion

Baesnasite - cushion

Extremely rare mineral Baesnasite that contains Cerium, a rare earth element.   Transluscent with go..

$247.00
Blue Topaz - octagon

Blue Topaz - octagon

Flawless octagon with London blue color.   20.80 carats  $25/ct..

$520.00
Boulder Opal - cabochon

Boulder Opal - cabochon

High-grade Boulder Opal with electric color-play and dark, multicolored matrix.   Price is $15 / car..

$175.00
Boulder Opal - cabochon

Boulder Opal - cabochon

High-grade Boulder Opal with electric color-play and multi-colored matrix. Price is $15/carat...

$210.00
Boulder Opal - cabochon

Boulder Opal - cabochon

High-grade Boulder Opal with strong play of color and multi-colored matrix. Solid, with brilliant po..

$186.00
Chrysoberyl Cat's Eye - cabochon

Chrysoberyl Cat's Eye - cabochon

Well-cut, honey-colored cat's eye Chrysoberyl with strong eye. Phenomenal and rare stone.   ..

$505.00
Chrysoprase - cabochon

Chrysoprase - cabochon

Bright green Chrysoprase with excellent color. Chrysoprase makes a great substitute for Jadeite,..

$55.00
Chrysoprase - cabochon

Chrysoprase - cabochon

Beautiful, bright green Chrysoprase with excellent luster. Chrysoprase makes an excellent substi..

$55.00
Chrysoprase - cabochon

Chrysoprase - cabochon

Beautiful, bright green Chrysoprase with outstanding color and luster. Chrysoprase makes an exce..

$95.00
Citrine ( Madeira ) - drop

Citrine ( Madeira ) - drop

Flawless Madeira Citrine drop with outstanding, rich orange color and excellent cutting.   Flawless...

$513.00
Citrine (Madeira) - oval

Citrine (Madeira) - oval

Flawless Madeira Citrine oval with excellent cutting and golden orange color.  Almost all Citrine us..

$154.00
Citrine (Madeira) - oval

Citrine (Madeira) - oval

The best Citrine is Madeira Citrine, a deep orange color.  This oval is clean and well cut, a bright..

$114.00
Citrine (Madeira) - round

Citrine (Madeira) - round

Brilliant flawless Madeira Citrine round gem, this is fine Amethyst that has been heated to be Citri..

$109.00
Citrine - cushion

Citrine - cushion

Beautiful, bright orange Citrine cushion.   Birthstone for November...

$239.00
Citrine - octagon

Citrine - octagon

Deep orange Citrine, flawless stepcut octagon,  November birthstone. 14.05 carats $28/ct..

$390.00
Citrine - oval

Citrine - oval

Checkerboard oval Citrine.   Birthstone for November...

$30.00
Diamond

Diamond

5.59 carat yellow crystal with excellent codecahedral form, translucent..

$825.00
Diamond - round

Diamond - round

Nice solitaire Diamond, .57 carat.SI1 H color, 6.18x3.76mm    57.5% depth..

$825.00
Diamond - round

Diamond - round

Round brilliant. .47 carat, SI1 J color 58% depth, a few naturals..

$670.00
Emerald ( Synthetic ) - octagon

Emerald ( Synthetic ) - octagon

Extremely fine, synthetic Emerald with classic, deep-green color.   This material was produced in Ru..

$370.00
Emerald ( Synthetic ) - octagon

Emerald ( Synthetic ) - octagon

Flawless square octagon, step cut.   This synthetic material was produced in Russian and is no longe..

$368.00
Emerald ( Synthetic ) - parallelogram

Emerald ( Synthetic ) - parallelogram

Flawless zigzag cut, $80/ct. 9x6mm..

$149.00
Emerald ( Synthetic ) - trillion / cushion

Emerald ( Synthetic ) - trillion / cushion

Flawless Emerald trillion of the finest color, cut from vintage synthetic rough that is no longer av..

$177.00
Garnet ( Spessartite ) - drop

Garnet ( Spessartite ) - drop

Orange red pear shape, excellent clarity, minor inclusions  5.09 carats $60/ct..

$302.00
Garnet , Demantoid ( variety of Andradite ) - cabochon

Garnet , Demantoid ( variety of Andradite ) - cabochon

Extremely rare, gemmy cabochon of Demantoid Garnet with beautiful, deep, forest-green color.   Extre..

$400.00
Garnet - hexagon

Garnet - hexagon

Flawless Mozambique garnet hexagon, a real unusual red gem. 2.82 carats$50/ct..

$141.00
Garnet Parcel

Garnet Parcel

Parcelof ten 4x6 octagons.   Total weight is 8 carats.   posted..

$15.00
Garnet Parcel

Garnet Parcel

Pacrel of ten 7x5 Garnet octagons.   Total weight is 12.6 carats.   posted..

$25.00
Garnet Parcel - heart

Garnet Parcel - heart

Parcel of ten 6mm garnet hearts.   Total weight is 9.69 carats.   posted..

$30.00
Garnet Parcel - heart

Garnet Parcel - heart

Parcel of ten 5mm Garnet hearts. Total weight is 5.09 carats.   posted..

$20.00
Garnet Parcel - octagon

Garnet Parcel - octagon

Parcel of ten 3x6 Garnet baguettes.   Total weight is 4.54 carats.   posted..

$15.00
Garnet Parcel - oval

Garnet Parcel - oval

Parcel of ten 7x5 Garnet ovals.   Total weight is 11.26 carats...

$20.00
Garnet Parcel - oval

Garnet Parcel - oval

Parcel of ten 8x6 Garnet ovals.   Total weight is 15.95 carats.   posted..

$25.00
Garnet var. Hessonite - cushion

Garnet var. Hessonite - cushion

Bright red Hessonite cushion with excellent color.  Faces up super, has moderate inclusions througho..

$448.00
Garnet var. Hessonite - oval

Garnet var. Hessonite - oval

Brilliant, wine red, clean to the eye Hessonite Garnet  oval, 3.12 carats, $85/ct..

$263.00
Garnet var. Merelani Mint

Garnet var. Merelani Mint

Clean to the eye, rare, pale greenish-blue Garnet from discovery in Tanzania.   Perfect cut...

$500.00
Garnet var. Pyrope - hexagon

Garnet var. Pyrope - hexagon

Flawless deep red Pyrope Garnet cut in unusual six sided star cut.  Looks like a red star.  We can m..

$306.00
Garnet var. Rhodolite - octagon

Garnet var. Rhodolite - octagon

Deep-red Rhodolite Garnet octagon.   Eye clean.   Price is $45 / carat.   posted..

$115.00
Garnet var. Spessartite - cabochon

Garnet var. Spessartite - cabochon

Bright-orange cabochon of Spessartite Garnet.   Very aesthetic. Price is $25 / carat.   ..

$169.00
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