Large Amethyst

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The house we purchased has several large rocks in the yard.?

Someone mentioned that one of them might be Amethyst. It is a large rock about 2ft x 3ft. Is there any way I can tell without breaking it. If it is, does it have any value? I have one that I think is called brain coral. Any info on this one? Thanks for your help..:)

Amethyst is purple or violet crystals, and has a hardness of 7 on the Moh's scale, meaning it will scratch glass with about the same effort as other quartz minerals (Hint: most sand is made up of quartz minerals). Being a form of quartz, few acids react with it, so if you put it in a cup of warm vinegar (that's weak acetic acid) it shouldn't have a steady stream of tiny bubbles like limestone or calcite would have. When you heat Amethyst it usually turns permanently yellow.

Amethyst used to be as valuable as emeralds, rubies, diamonds, and other precious gemstones, that is until discoveries of huge deposits of it in Brazil made the value drop a great deal, but it is still worth a fair amount to collectors if it is an unusual specimen.

Check out these deals on Large Amethyst-related items and save!

LARGE Crystal Amethyst Amy Brown Fairy Gemstone Gem Tree MADE IN USA
LARGE Crystal Amethyst Amy Brown Fairy Gemstone Gem Tree MADE IN USA
$199.99
Large Smoky Amethyst Sphere Crystal Ball
Large Smoky Amethyst Sphere Crystal Ball
$161.20
AMETHYST CRYSTAL GEODE LARGE  HEAVY 6 14wX5hx2 3 4d 4 122oz
AMETHYST CRYSTAL GEODE LARGE HEAVY 6 14wX5hx2 3 4d 4 122oz
$9.99
AMAZING Pair Large Amethyst Geodes 63 Tall
AMAZING Pair Large Amethyst Geodes 63 Tall
$10,225.00
Pair Large Amethyst Geodes Completely Polished 25 1 2 Tall
Pair Large Amethyst Geodes Completely Polished 25 1 2 Tall
$7,555.00
LOT of Large Amethyst Geodes and Citrine
LOT of Large Amethyst Geodes and Citrine
$5,355.00
AA Large Amethyst Flower Rio Grande do Sol Brazil 15957
AA Large Amethyst Flower Rio Grande do Sol Brazil 15957
$375.00
18 Amethyst Smoky SCEPTERED QUARTZ Crystal Lrg Head Small Shaft India for sale
18 Amethyst Smoky SCEPTERED QUARTZ Crystal Lrg Head Small Shaft India for sale
$65.00
Large Espirito de Santo Smoky Amethyst Polished Point Free Form
Large Espirito de Santo Smoky Amethyst Polished Point Free Form
$1,875.00
Large Scepter Amethyst Smokey Skeletal Quartz from Brandberg Namibia 25562
Large Scepter Amethyst Smokey Skeletal Quartz from Brandberg Namibia 25562
$650.00
NEW LARGE NATURAL BRAZILIAN CHEVRON AMETHYST CRYSTAL TUMBLED GEMSTONE PENDANT
NEW LARGE NATURAL BRAZILIAN CHEVRON AMETHYST CRYSTAL TUMBLED GEMSTONE PENDANT
$13.45
NEW LARGE NATURAL SUPER 7 AMETHYST POINT PENDANT W DREAM  BEADED CHARM
NEW LARGE NATURAL SUPER 7 AMETHYST POINT PENDANT W DREAM BEADED CHARM
$17.95
LARGE AMETHYST LACE SLAB 129 GRAMS
LARGE AMETHYST LACE SLAB 129 GRAMS
$4.00
LARGE AMETHYST CRYSTAL CLUSTER GEODE FROM URUGUAY
LARGE AMETHYST CRYSTAL CLUSTER GEODE FROM URUGUAY
$134.25
LARGE AMETHYST CRYSTAL CLUSTER GEODE FROM URUGUAY CATHEDRAL
LARGE AMETHYST CRYSTAL CLUSTER GEODE FROM URUGUAY CATHEDRAL
$149.96
Large Natural Amethyst Crystal Ball stone art mineral carving A6
Large Natural Amethyst Crystal Ball stone art mineral carving A6
$120.00
Large Natural Amethyst Crystal Ball stone art mineral carving A6
Large Natural Amethyst Crystal Ball stone art mineral carving A6
$120.00
Narural large amethyst crystal cluster rock
Narural large amethyst crystal cluster rock
$0.99
DINO Large AMETHYST CRYSTAL Polished Geode 1 lb 92oz Healing
DINO Large AMETHYST CRYSTAL Polished Geode 1 lb 92oz Healing
$48.99
Large Amethyst Crystals from Brazil Rich Purple Large Healing Stones
Large Amethyst Crystals from Brazil Rich Purple Large Healing Stones
$75.00
Large Amethyst Crystals from Brazil Rich Purple Large Healing Stones
Large Amethyst Crystals from Brazil Rich Purple Large Healing Stones
$170.00
NEW LARGE NATURAL BRAZILIAN AMETHYST DRUSY GEODE CLUSTER
NEW LARGE NATURAL BRAZILIAN AMETHYST DRUSY GEODE CLUSTER
$8.99
Crystal Allies Materials 1lb Tumbled Amethyst Stones Large 1 Mixed Quality
Crystal Allies Materials 1lb Tumbled Amethyst Stones Large 1 Mixed Quality
$0.99
LARGE 125LBS AMETHYST CRYSTAL CLUSTER SPECIMEN GEODE DISPLAY
LARGE 125LBS AMETHYST CRYSTAL CLUSTER SPECIMEN GEODE DISPLAY
$74.99
Amethyst Geode Display Large Specimen
Amethyst Geode Display Large Specimen
$40.00
16 Large Head AMETHYST SCEPTER QUARTZ Gemmy Crystal India for sale
16 Large Head AMETHYST SCEPTER QUARTZ Gemmy Crystal India for sale
$60.00
Large Multi Gemstone Cluster Wire Bonsai Tree Crystal Amethyst Geode
Large Multi Gemstone Cluster Wire Bonsai Tree Crystal Amethyst Geode
$29.95
LARGE AMETHYST BRAZILIAN GEODE FOR DISPLAY f787
LARGE AMETHYST BRAZILIAN GEODE FOR DISPLAY f787
$290.00
Fine Mineral Specimen AMETHYST 02 Vera Cruz Mexico LARGE SCEPTER
Fine Mineral Specimen AMETHYST 02 Vera Cruz Mexico LARGE SCEPTER
$350.00
LARGE AMETHYST CRYSTAL CLUSTER GEODE FROM URUGUAY CATHEDRAL
LARGE AMETHYST CRYSTAL CLUSTER GEODE FROM URUGUAY CATHEDRAL
$187.46
1 4 lb AMETHYST POINTS n PIECES Uruguay Bulk Mix Sizes Med Lrg Aprox 20
1 4 lb AMETHYST POINTS n PIECES Uruguay Bulk Mix Sizes Med Lrg Aprox 20
$9.95
Large 5 1 4 inch Amethyst Wing on Matrix Karur India
Large 5 1 4 inch Amethyst Wing on Matrix Karur India
$85.00
1 Large Banded Amethyst Healing Crystal Tumbled Reiki Addictions Third Eye Calm
1 Large Banded Amethyst Healing Crystal Tumbled Reiki Addictions Third Eye Calm
$3.49
LARGE AMETHYST CRYSTAL CLUSTER GEODE FROM URUGUAY
LARGE AMETHYST CRYSTAL CLUSTER GEODE FROM URUGUAY
$246.75
Amethyst Cathedral Deep Purple beautiful Natural Geode Crystal Cluster Large
Amethyst Cathedral Deep Purple beautiful Natural Geode Crystal Cluster Large
$499.99
6 Large Amethyst Crystal Points 1876 grams Combined Weight
6 Large Amethyst Crystal Points 1876 grams Combined Weight
$4.99
Large Stunning Cacoxenite In Amethyst Cab Pendant 155 ct Gorgeous Stone
Large Stunning Cacoxenite In Amethyst Cab Pendant 155 ct Gorgeous Stone
$9.99
Large Amethyst Cluster Church Exact Lamp Cord  LED Bulb 7 FREE GIFT TOO
Large Amethyst Cluster Church Exact Lamp Cord LED Bulb 7 FREE GIFT TOO
$59.95
Large Amethyst Cluster Church Exact Lamp Cord  LED Bulb 5 FREE GIFT TOO
Large Amethyst Cluster Church Exact Lamp Cord LED Bulb 5 FREE GIFT TOO
$59.95
LARGE AMETHYST GEODE DISPLAY ITEM VERY PURPLE CATHEDRAL TYPE 3 1 2 LBS
LARGE AMETHYST GEODE DISPLAY ITEM VERY PURPLE CATHEDRAL TYPE 3 1 2 LBS
$70.10
LIGHT AMETHYST QUARTZ CRYSTAL LARGE DOWSING PENDULUM 25 gr
LIGHT AMETHYST QUARTZ CRYSTAL LARGE DOWSING PENDULUM 25 gr
$11.00
LARGE 13LB BRAZILIAN THUNDER EGG GEODE AMETHYST CRYSTALS MEASURES 10 X 8 X 5
LARGE 13LB BRAZILIAN THUNDER EGG GEODE AMETHYST CRYSTALS MEASURES 10 X 8 X 5
$59.99
Large Smoky Amethyst Sphere Crystal Ball
Large Smoky Amethyst Sphere Crystal Ball
$142.00
Large Amethyst Gemstone Tree on Amethyst Cluster 45 Tall
Large Amethyst Gemstone Tree on Amethyst Cluster 45 Tall
$65.00
Large AMETHYST Quartz Geode Agate BEAUTIFUL Natural Rock
Large AMETHYST Quartz Geode Agate BEAUTIFUL Natural Rock
$129.99
Large Uruguayan Uruguay Amethyst Crystal Cluster w Cut Base and Druse
Large Uruguayan Uruguay Amethyst Crystal Cluster w Cut Base and Druse
$199.00
Crystal Allies Materials 10lb Rough Banded Amethyst Stones Large 1
Crystal Allies Materials 10lb Rough Banded Amethyst Stones Large 1
$25.89
fine large amethyst from Ankazobe Madagascar
fine large amethyst from Ankazobe Madagascar
$200.00
Crystal Allies Materials 1lb Tumbled Chevron Amethyst Stones Large 1
Crystal Allies Materials 1lb Tumbled Chevron Amethyst Stones Large 1
$14.95
Crystal Allies Materials 8lb Tumbled Amethyst Stones Large 1 Mixed Quality
Crystal Allies Materials 8lb Tumbled Amethyst Stones Large 1 Mixed Quality
$9.99
LARGE AMETHYST POINT FOR DISPLAY BEAUTIFUL PIECE K713 714
LARGE AMETHYST POINT FOR DISPLAY BEAUTIFUL PIECE K713 714
$165.00
23 POUND AMETHYST GEODE RING WITH LARGE CRYSTALS SELF STANDING K689 690
23 POUND AMETHYST GEODE RING WITH LARGE CRYSTALS SELF STANDING K689 690
$152.00
LARGE AMETHYST QUARTZ CRYSTALS MALI AFRICA
LARGE AMETHYST QUARTZ CRYSTALS MALI AFRICA
$1.75
LARGE 12 lb AMETHYST GEODE CRYSTAL ESTATE PURPLE GIFT No Reserve
LARGE 12 lb AMETHYST GEODE CRYSTAL ESTATE PURPLE GIFT No Reserve
$49.99
Large Amethyst Flower Blooming Crystal Clusters Pale Purple Delicate Glass
Large Amethyst Flower Blooming Crystal Clusters Pale Purple Delicate Glass
$250.00
LARGE AMETHYST CRYSTAL CLUSTER GEODE CATHEDRAL FROM URUGUAY
LARGE AMETHYST CRYSTAL CLUSTER GEODE CATHEDRAL FROM URUGUAY
$224.25
LARGE AMETHYST CRYSTAL CLUSTER CATHEDRAL GEODE FROM URUGUAY
LARGE AMETHYST CRYSTAL CLUSTER CATHEDRAL GEODE FROM URUGUAY
$96.75
Amethyst Crystal Large 8 lbs 141 ounces Sits Up
Amethyst Crystal Large 8 lbs 141 ounces Sits Up
$116.50
Large Amethyst Geode Crystal Cathedreal Cluster
Large Amethyst Geode Crystal Cathedreal Cluster
$500.00
Crystal Allies Materials 3lb Rough Brazilian 10 Stone Mix Large Amethyst Stones
Crystal Allies Materials 3lb Rough Brazilian 10 Stone Mix Large Amethyst Stones
$0.99
LARGE 4180ct SINGLE PIECE NATURALTRANSPARENT MAUVE URUGUAY AMETHYST ROUGH
LARGE 4180ct SINGLE PIECE NATURALTRANSPARENT MAUVE URUGUAY AMETHYST ROUGH
$11.37
Yummy Large Rich Rich Purple DRUZY URUGUAY AMETHYST HEARTSparkler
Yummy Large Rich Rich Purple DRUZY URUGUAY AMETHYST HEARTSparkler
$78.99
AMAXING GORGEOUS LARGE 45 PURPLE AMETHYST CLUSTER CANDLE HOLDER W TEA LIGHT
AMAXING GORGEOUS LARGE 45 PURPLE AMETHYST CLUSTER CANDLE HOLDER W TEA LIGHT
$49.99
Stunning Large Amethyst Specimen Weighs 2lbs 93oz
Stunning Large Amethyst Specimen Weighs 2lbs 93oz
$65.00
Large Amethyst Cluster 7 x 35in
Large Amethyst Cluster 7 x 35in
$35.00
Large Pendant Size Amethyst Flower Stalactite Slice Polished Both Sides g77
Large Pendant Size Amethyst Flower Stalactite Slice Polished Both Sides g77
$18.00
Large Pendant Size Amethyst Flower Stalactite Slice Polished Both Sides g67
Large Pendant Size Amethyst Flower Stalactite Slice Polished Both Sides g67
$18.00
Large Pendant Size Amethyst Flower Stalactite Slice Polished Both Sides g64
Large Pendant Size Amethyst Flower Stalactite Slice Polished Both Sides g64
$14.40
Large Pendant Size Amethyst Flower Stalactite Slice Polished Both Sides g71
Large Pendant Size Amethyst Flower Stalactite Slice Polished Both Sides g71
$18.00
Large Pendant Size Amethyst Flower Stalactite Slice Polished Both Sides g73
Large Pendant Size Amethyst Flower Stalactite Slice Polished Both Sides g73
$14.40
Large Rough AMETHYST GEMSTONE purple quartz
Large Rough AMETHYST GEMSTONE purple quartz
$175.00
Large Amethyst Rock w Bigger Size Crystals 4 1 2 lbs Fabulous Exotic Specimen
Large Amethyst Rock w Bigger Size Crystals 4 1 2 lbs Fabulous Exotic Specimen
$75.00
Thunder Bay amethyst large specimen
Thunder Bay amethyst large specimen
$28.00
6 Large Amethyst Crystal Points 1944 grams Combined Weight
6 Large Amethyst Crystal Points 1944 grams Combined Weight
$4.99
Old Vintage AMETHYST GEODE LARGE SLICE Purple Beauty Quartz Crystals Fine GEM
Old Vintage AMETHYST GEODE LARGE SLICE Purple Beauty Quartz Crystals Fine GEM
$19.99
Pair Large Amethyst Geodes 29 1 4  28  Tall R865R862
Pair Large Amethyst Geodes 29 1 4 28 Tall R865R862
$1,411.00
Large Brandberg Amethyst Venster Quartz Crystal Dark Purple On Matrix 14 03 286
Large Brandberg Amethyst Venster Quartz Crystal Dark Purple On Matrix 14 03 286
$32.00
Large smokey amethyst crystal Georgia locale
Large smokey amethyst crystal Georgia locale
$25.00
Large Doublet amethyst crystal Georgia locale
Large Doublet amethyst crystal Georgia locale
$15.00
Large Amethyst crystal Georgia locale
Large Amethyst crystal Georgia locale
$12.00
Large amethyst crystal Georgia locale
Large amethyst crystal Georgia locale
$15.00
OUTSTANDING 18 LB URUGUAY AMETHYST OBELISK POINT  AAA AGATE MUSEUM GRADE
OUTSTANDING 18 LB URUGUAY AMETHYST OBELISK POINT AAA AGATE MUSEUM GRADE
$86.00
OUTSTANDING 11+ LB AMETHYST LARGE POINTS SUPERB COLOR  INCLUSIONS BRAZIL
OUTSTANDING 11+ LB AMETHYST LARGE POINTS SUPERB COLOR INCLUSIONS BRAZIL
$98.00
Large Heavy Amethyst Stalagtite Crystal from Brazil
Large Heavy Amethyst Stalagtite Crystal from Brazil
$549.00
Large Nice Bright Gemmy Purple Amethyst Quartz Scepter
Large Nice Bright Gemmy Purple Amethyst Quartz Scepter
$11.99
LARGE AMETHYST FRAGMENT 1 LBS 4 OZ 5 in x 5 in x 15 in DISPLAY STONE ROCK
LARGE AMETHYST FRAGMENT 1 LBS 4 OZ 5 in x 5 in x 15 in DISPLAY STONE ROCK
$35.00
RARE collectors specimen Amethyst geode with large crystal citrine and garnet
RARE collectors specimen Amethyst geode with large crystal citrine and garnet
$520.00
Amethyst Flower or R0se Amethyst formation Large Cabinet
Amethyst Flower or R0se Amethyst formation Large Cabinet
$46.00
Leaopard Stone Flying Owl Carving On Large Amethyst Specimen Idar Oberstein
Leaopard Stone Flying Owl Carving On Large Amethyst Specimen Idar Oberstein
$3,200.00
LARGE POLISHED TWINNED COCONUT AMETHYST  SMOKEY QUARTZ CRYSTAL GEODE
LARGE POLISHED TWINNED COCONUT AMETHYST SMOKEY QUARTZ CRYSTAL GEODE
$78.00
AA Aesthetic Large Amethyst Flower Rio Grande do Sol Brazil 17832
AA Aesthetic Large Amethyst Flower Rio Grande do Sol Brazil 17832
$175.00
Killer Large Amethyst Plate Rio Grande do Sol Brazil 17835
Killer Large Amethyst Plate Rio Grande do Sol Brazil 17835
$275.00
UruguayAmethyst crystal clusterlarge points and rich color2lbs 8ozL6xW5
UruguayAmethyst crystal clusterlarge points and rich color2lbs 8ozL6xW5
$59.00
Large Amethyst Cluster 875 x 45in
Large Amethyst Cluster 875 x 45in
$42.00
X Large Calcite on Amethyst Plate from Rio Grande do Sol Brazil 14302
X Large Calcite on Amethyst Plate from Rio Grande do Sol Brazil 14302
$375.00
LARGE AMETHYST CRYSTAL FOR CUTTING 12oz ROUGH
LARGE AMETHYST CRYSTAL FOR CUTTING 12oz ROUGH
$4.89
Large Amethyst Cathedral and stand
Large Amethyst Cathedral and stand
$90.00
Large Purple Quartz Rock 15x6x4 Amethyst Like
Large Purple Quartz Rock 15x6x4 Amethyst Like
$100.00
LARGE ALL NATURAL AMETHYST QUARTZ CRYSTAL MALI AFRICA
LARGE ALL NATURAL AMETHYST QUARTZ CRYSTAL MALI AFRICA
$1.25



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