Best Octagon Loose Gemstones in 2026

Daisy
Last Updated: Jul 19, 2026

At a Glance: Our Top Picks for Octagon Loose Gemstones

INDIAGEMS 150 Carat Natural Multi Fire Labradorite Wholesale Lot Loose Gemstone Jewellery Making Cabochon Smooth Polished Flat Back. Healing Crystal Palm Stone
#TOP1
Indiagems 150 Carat Natural Multi Fire Labradorite Wholesale
8.9
PM SCORE
Gryrigns 2Pcs 5.8cts Octagon Loose Imitative Emerald Stone 10x8mm 3A Grade VVS Clarity Nano Green Gemstone for Jewelry Making
#TOP2
Gryrigns 2Pcs 5.8Cts Octagon Loose Imitative Emerald Stone
4.1
PM SCORE
55Carat Original Malachite 6X8 mm cabochon Loose Gemstone Octagon Shape For Astrological Jewelry Making
#TOP3
55Carat Original Malachite 6X8 Mm Cabochon Loose Gemstone
1.1
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the Best Octagon Loose Gemstones of 2026

Market Overview
Octagon Loose Gemstones Reviewed
  • Reviews Analyzed: 217 Items
  • PM Avg. Rating: 0.9 / 10
19 Products Evaluated
  • Highest Price: $6,053.35
  • Lowest Price: $8.58
  • Avg. Price: $1,258.48

Indiagems 150 Carat Natural Multi Fire Labradorite Wholesale Lot Loose Gemstone Jewellery Making Cabochon Smooth Polished Flat Back. Healing Crystal Palm Stone

INDIAGEMS
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Gems & Cabs Emporium 5.93

Features

Natural Multi Fire Labradorite Wholesale Lot Gemstone Loose Cabochon For Pendant And Ring Silver Jewelry Making Handmade Gemstone Healing Crystal Best Collection For Gift Wholesale Price For Special Order Any Shape And Size Available. And You want Big Quantity I will give you extra Discount.

Shape- Pear Oval Square Rectangle Marquise Fancy Octagon Round Trillion

Size- 12X16 And 35x40 MM

Weight- 150 Carats

Grade- High Grade AAA+++

Gryrigns 2Pcs 5.8Cts Octagon Loose Imitative Emerald Stone 10X8Mm 3A Grade Vvs Clarity Nano Green Gemstone For Jewelry Making

GRYRIGNS
20220605-8X10
1.77 X 1.77 X 0.79 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Ms. Ring 6.95

Features

Weighs approx 2.9cts per pieces (5.8cts in total), dimensions 10x8mm, emerald cut, 3A-grade, VVS clarity, 2Pcs in total.

Nano gems is a perfect emerald gemstone imitation. It has good physical properties with high heat resistance up to 1500s℃, 7.5 Mohs hardness, 1.62 high reflection, and good heat color stability that suitable for lost-wax casting.

Emerald stone is known as the birthstone of May. The green color of May’s birthstone is a symbol of wealth and abundance, love and passion, and success and wisdom.

If you want to create your own setting for this stone, or if you are simply collecting loose gems, this is an excellent option.

Our loose stones are collected in a display box with a clear lid and sponge, which keep the stones from moving or shifting while allowing them to be seen clearly.

55Carat Original Malachite 6X8 Mm Cabochon Loose Gemstone Octagon Shape For Astrological Jewelry Making

55CARAT
2020-55CTMULLG17-160
8.00 X 6.00 X 0.00 Millimeters
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
55carat 6.30

Features

NATURAL GEMSTONE: Natural Amethyst, Onyx, Blue Chalcedony, Citrine, Crystal Quartz, Green Amethyst, Labradorite, Rose Quartz, Lapis lazuli, Lemon Quartz, Malachite, Mystic Quartz, Rainbow Moonstone, Rutile Quartz, Smoky Quartz, Tiger eye, Iolite, Garnet, Peridot , Blue Topaz Octagon Shape Loose Gemstone at Wholesale Rate.

PERFECT FOR: Astrologer Purpose, Jewelers,Jewelry makers , Goldsmiths , Designers, Craftmen ,Collectors or a gift for special one.

WHOLESALE ORDERS: We Supply Gemstones at WHOLESALE RATE. Please contact us for Bulk orders.

CONTACT US: If you have any question, please post into "Customer Questions & Answers" below the "Product specifications

NOTE: Product colour may slightly vary due to photographic lighting sources or your monitor settings.

55Carat Original Red Onyx 7X9 Mm Cabochon Loose Gemstone Octagon Shape For Astrological Chakra Healing

55CARAT
2020-55CTMULLG17-191
9.00 X 7.00 X 0.00 Millimeters
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
55carat 6.21

Features

NATURAL GEMSTONE: Natural Amethyst, Onyx, Blue Chalcedony, Citrine, Crystal Quartz, Green Amethyst, Labradorite, Rose Quartz, Lapis lazuli, Lemon Quartz, Malachite, Mystic Quartz, Rainbow Moonstone, Rutile Quartz, Smoky Quartz, Tiger eye, Iolite, Garnet, Peridot , Blue Topaz Octagon Shape Loose Gemstone at Wholesale Rate.

PERFECT FOR: Astrologer Purpose, Jewelers,Jewelry makers , Goldsmiths , Designers, Craftmen ,Collectors or a gift for special one.

WHOLESALE ORDERS: We Supply Gemstones at WHOLESALE RATE. Please contact us for Bulk orders.

CONTACT US: If you have any question, please post into "Customer Questions & Answers" below the "Product specifications

NOTE: Product colour may slightly vary due to photographic lighting sources or your monitor settings.

55Carat Natural Amethyst 12X16 Mm Faceted Cut Loose Gemstone Octagon Shape For Jewellery Making Astrology

55CARAT
2020-55CTMULLG17-18
16.00 X 12.00 X 0.00 Millimeters
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
55carat 6.21

Features

NATURAL GEMSTONE: Natural Amethyst, Onyx, Blue Chalcedony, Citrine, Crystal Quartz, Green Amethyst, Labradorite, Rose Quartz, Lapis lazuli, Lemon Quartz, Malachite, Mystic Quartz, Rainbow Moonstone, Rutile Quartz, Smoky Quartz, Tiger eye, Iolite, Garnet, Peridot , Blue Topaz Octagon Shape Loose Gemstone at Wholesale Rate.

PERFECT FOR: Astrologer Purpose, Jewelers,Jewelry makers , Goldsmiths , Designers, Craftmen ,Collectors or a gift for special one.

WHOLESALE ORDERS: We Supply Gemstones at WHOLESALE RATE. Please contact us for Bulk orders.

CONTACT US: If you have any question, please post into "Customer Questions & Answers" below the "Product specifications

NOTE: Product colour may slightly vary due to photographic lighting sources or your monitor settings.

55Carat Genuine Lapis Lazuli 10X14 Mm Cabochon Cut Loose Gemstone Octagon Shape For Astrological Purpose

55CARAT
2020-55CTMULLG17-139
14.00 X 10.00 X 0.00 Millimeters
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
55carat 6.21

Features

NATURAL GEMSTONE: Natural Amethyst, Onyx, Blue Chalcedony, Citrine, Crystal Quartz, Green Amethyst, Labradorite, Rose Quartz, Lapis lazuli, Lemon Quartz, Malachite, Mystic Quartz, Rainbow Moonstone, Rutile Quartz, Smoky Quartz, Tiger eye, Iolite, Garnet, Peridot , Blue Topaz Octagon Shape Loose Gemstone at Wholesale Rate.

PERFECT FOR: Astrologer Purpose, Jewelers,Jewelry makers , Goldsmiths , Designers, Craftmen ,Collectors or a gift for special one.

WHOLESALE ORDERS: We Supply Gemstones at WHOLESALE RATE. Please contact us for Bulk orders.

CONTACT US: If you have any question, please post into "Customer Questions & Answers" below the "Product specifications

NOTE: Product colour may slightly vary due to photographic lighting sources or your monitor settings.

#TOP7

Lot Of 100 Pieces Natural Garnet 7X5Mm Octagon Shape Faceted Cut Loose Gemstone For Jewelry Making | Aaa Quality 7X5Mm Octagon Shape Calibrated Size Semi-Precious Gemstone

NEERUPAM COLLECTION
NC-OCTA-GAR-7X5-100
3.94 X 1.97 X 1.97 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Neerupam Collection 5.96

Features

100% Natural Garnet Calibrated Size 100 pieces Lot

Octagon Shape Faceted Cut, Red color Natural Garnet Semi-Precious Gemstone

AAA Quality Stone with excellent fire & fine Lusture for Garnet Ring , Garnet Studs , Garnet Earring , Garnet bracelet, Garnet Pendant and Garnet Jewelry

Weight approx 131 carats & size 7X5 mm

Loose gemstones to be studded in a piece of Jewellery

#TOP8

Lot Of 200 Pieces Natural Garnet 8X6Mm Octagon Shape Faceted Cut Loose Gemstone For Jewelry Making | Aaa Quality 8X6Mm Octagon Shape Calibrated Size Semi-Precious Gemstone

NEERUPAM COLLECTION
NC-OCTA-GAR-8X6-200
3.94 X 1.97 X 1.97 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Neerupam Collection 5.96

Features

100% Natural Garnet Calibrated Size 200 pieces Lot

Octagon Shape Faceted Cut, Red color Natural Garnet Semi-Precious Gemstone

AAA Quality Stone with excellent fire & fine Lusture for Garnet Ring , Garnet Studs , Garnet Earring , Garnet bracelet, Garnet Pendant and Garnet Jewelry

Weight approx 412 carats & size 8X6 mm

Loose gemstones to be studded in a piece of Jewellery

#TOP9

Lot Of 200 Pieces Natural Rhodolite Garnet 9X7Mm Octagon Shape Faceted Cut Loose Gemstone For Jewelry Making | Aaa Quality 9X7Mm Octagon Shape Calibrated Size Semi-Precious Gemstone

NEERUPAM COLLECTION
NC-OCTA-RHODO-9X7-200
3.94 X 1.97 X 1.97 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Neerupam Collection 5.96

Features

100% Natural Rhodolite Garnet Calibrated Size 200 pieces Lot

Octagon Shape Faceted Cut, Red color Natural Rhodolite Garnet Semi-Precious Gemstone

AAA Quality Stone with excellent fire & fine Lusture for Rhodolite Garnet Ring , Rhodolite Garnet Studs , Rhodolite Garnet Earring , Rhodolite Garnet bracelet, Rhodolite Garnet Pendant and Rhodolite Garnet Jewelry

Weight approx 608 carats & size 9X7 mm

Loose gemstones to be studded in a piece of Jewellery

#TOP10

Igi Certified & Appraised Making Loose Gemstone Green Tanzanite Faceted Octagon Engagement Anniversary Wedding Promise

SHOP LC DELIVERING JOY
3507371
0.31 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SHOP LC 9.66

Features

PREMIUM GRADE: This gem is AAAA graded with IGI certification

CARAT WEIGHT: The exquisite gemstone comes with a weight of 3.66 ct.

SHAPE: It is precisely cut in octagon shape for a classic appeal

SIZE: After cutting, the gemstone is brilliantly faceted to 9.62x6.68 mm with an excellent finish

ORIGIN: Known for its exuberant beauty and rarity, the gem is found in the Merelani Foothills surrounding Mt. Kilimanjaro,

#TOP11

Lot Of 200 Pieces Natural Rhodolite Garnet 8X6Mm Octagon Shape Faceted Cut Loose Gemstone For Jewelry Making | Aaa Quality 8X6Mm Octagon Shape Calibrated Size Semi-Precious Gemstone

NEERUPAM COLLECTION
NC-OCTA-RHODO-8X6-200
3.94 X 1.97 X 1.97 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Neerupam Collection 5.96

Features

100% Natural Rhodolite Garnet Calibrated Size 200 pieces Lot

Octagon Shape Faceted Cut, Red color Natural Rhodolite Garnet Semi-Precious Gemstone

AAA Quality Stone with excellent fire & fine Lusture for Rhodolite Garnet Ring , Rhodolite Garnet Studs , Rhodolite Garnet Earring , Rhodolite Garnet bracelet, Rhodolite Garnet Pendant and Rhodolite Garnet Jewelry

Weight approx 412 carats & size 8X6 mm

Loose gemstones to be studded in a piece of Jewellery

#TOP12

Lot Of 500 Pieces Natural Garnet 6X4Mm Octagon Shape Faceted Cut Loose Gemstone For Jewelry Making | Aaa Quality 6X4Mm Octagon Shape Calibrated Size Semi-Precious Gemstone

NEERUPAM COLLECTION
NC-OCTA-GAR-6X4-200
3.94 X 1.97 X 1.97 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Neerupam Collection 5.96

Features

100% Natural Garnet Calibrated Size 500 pieces Lot

Octagon Shape Faceted Cut, Red color Natural Garnet Semi-Precious Gemstone

AAA Quality Stone with excellent fire & fine Lusture for Garnet Ring , Garnet Studs , Garnet Earring , Garnet bracelet, Garnet Pendant and Garnet Jewelry

Weight approx 385 carats & size 6X4 mm

Loose gemstones to be studded in a piece of Jewellery

#TOP13

Lot Of 500 Pieces Natural Rhodolite Garnet 6X4Mm Octagon Shape Faceted Cut Loose Gemstone For Jewelry Making | Aaa Quality 6X4Mm Octagon Shape Calibrated Size Semi-Precious Gemstone

NEERUPAM COLLECTION
NC-OCTA-RHODO-6X4-200
3.94 X 1.97 X 1.97 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Neerupam Collection 5.96

Features

100% Natural Rhodolite Garnet Calibrated Size 500 pieces Lot

Octagon Shape Faceted Cut, Red color Natural Rhodolite Garnet Semi-Precious Gemstone

AAA Quality Stone with excellent fire & fine Lusture for Rhodolite Garnet Ring , Rhodolite Garnet Studs , Rhodolite Garnet Earring , Rhodolite Garnet bracelet, Rhodolite Garnet Pendant and Rhodolite Garnet Jewelry

Weight approx 385 carats & size 6X4 mm

Loose gemstones to be studded in a piece of Jewellery

#TOP14

Arizona !Peridot Big Size Checker Board 20 X 17 Mm Faceted Octagon Loose Gemstone

COLORS OF JEWELS
CG322
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Colors of Jewels 5.20

Features

Arizona Peridot Big size Checker board 20 x 17 mm faceted Octagon Loose Gemstone

Item Name : - Loose Gemstones

Item Weight & Size : - 29.65 Cts ,20 x 17 mm

Main Stone Color : - Green

Main Stone Shape : Octagon

#TOP15

Lot Of 50 Pieces Natural Rhodolite Garnet 7X5Mm Octagon Shape Faceted Cut Loose Gemstone For Jewelry Making | Aaa Quality 7X5Mm Octagon Shape Calibrated Size Semi-Precious Gemstone

NEERUPAM COLLECTION
NC-OCTA-RHODO-7X5-50
3.94 X 1.97 X 1.97 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Neerupam Collection 5.96

Features

100% Natural Rhodolite Garnet Calibrated Size 50 pieces Lot

Octagon Shape Faceted Cut, Red color Natural Rhodolite Garnet Semi-Precious Gemstone

AAA Quality Stone with excellent fire & fine Lusture for Rhodolite Garnet Ring , Rhodolite Garnet Studs , Rhodolite Garnet Earring , Rhodolite Garnet bracelet, Rhodolite Garnet Pendant and Rhodolite Garnet Jewelry

Weight approx 65.5 carats & size 7X5 mm

Loose gemstones to be studded in a piece of Jewellery

#TOP16

Lot Of 200 Pieces Natural Garnet 10X8Mm Octagon Shape Faceted Cut Loose Gemstone For Jewelry Making | Aaa Quality 10X8Mm Octagon Shape Calibrated Size Semi-Precious Gemstone

NEERUPAM COLLECTION
NC-OCTA-GAR-10X8-200
3.94 X 1.97 X 1.97 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Neerupam Collection 5.96

Features

100% Natural Garnet Calibrated Size 200 pieces Lot

Octagon Shape Faceted Cut, Red color Natural Garnet Semi-Precious Gemstone

AAA Quality Stone with excellent fire & fine Lusture for Garnet Ring , Garnet Studs , Garnet Earring , Garnet bracelet, Garnet Pendant and Garnet Jewelry

Weight approx 860 carats & size 10X8 mm

Loose gemstones to be studded in a piece of Jewellery

Gryrigns 2Pcs 11.5Cts Octagon Loose Imitative Emerald Stone 12X10Mm 3A Grade Vvs Clarity Nano Green Gemstone For Jewelry Making

GRYRIGNS
20220605-10X12
1.77 X 1.77 X 0.79 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING

Features

Weighs approx 5.75cts per pieces (11.5cts in total), dimensions 12x10mm, octagon cut, 3A-grade, VVS clarity, 2Pcs in total.

Nano gems is a perfect emerald gemstone imitation. It has good physical properties with high heat resistance up to 1500s℃, 7.5 Mohs hardness, 1.62 high reflection, and good heat color stability that suitable for lost-wax casting.

Emerald stone is known as the birthstone of May. The green color of May’s birthstone is a symbol of wealth and abundance, love and passion, and success and wisdom.

If you want to create your own setting for this stone, or if you are simply collecting loose gems, this is an excellent option.

Our loose stones are collected in a display box with a clear lid and sponge, which keep the stones from moving or shifting while allowing them to be seen clearly.

#TOP18

12.80X11 Mm Certified Natural Emerald Octagon Cut 6.99 Cts Untreated Loose Gemstone

SBI GEMS
6918717
0.50 X 0.43 X 0.24 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SBI Gems 5.10

Features

Ready for Jewelry Setting

Country of Origin: Brazil

Country of Manufacture: India

Shape: Octagon

Color: Green

Transparency: Opaque

Treatment: Not Enhancement

Cut Grade: Excellent

#TOP19

Lot Of 50 Pieces Natural Rhodolite Garnet 10X8Mm Octagon Shape Faceted Cut Loose Gemstone For Jewelry Making | Aaa Quality 10X8Mm Octagon Shape Calibrated Size Semi-Precious Gemstone

NEERUPAM COLLECTION
NC-OCTA-RHODO-10X8-50
3.94 X 1.97 X 1.97 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Neerupam Collection 5.96

Features

100% Natural Rhodolite Garnet Calibrated Size 50 pieces Lot

Octagon Shape Faceted Cut, Red color Natural Rhodolite Garnet Semi-Precious Gemstone

AAA Quality Stone with excellent fire & fine Lusture for Rhodolite Garnet Ring , Rhodolite Garnet Studs , Rhodolite Garnet Earring , Rhodolite Garnet bracelet, Rhodolite Garnet Pendant and Rhodolite Garnet Jewelry

Weight approx 215 carats & size 10X8 mm

Loose gemstones to be studded in a piece of Jewellery

Top 10 loose gemstones octagon Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Neerupam Collection 9
55Carat 4
Gryrigns 2
Colors Of Jewels 1
Indiagems 1
Sbi Gems 1
Shop Lc Delivering Joy 1

Top 10 loose gemstones octagon Brands Pie Chart


We've carried out a comprehensive analysis of 217 reviews on loose gemstones octagon, using our selection criteria to identify the best options in the arts & crafts. Our findings reveal that most customers typically select loose gemstones octagon priced around $1,258.48, with top brands including kraftgenius allstarco, allstarco, deluxe gems, govindstore, instagem, generic, colors of jewels, shop lc delivering joy and neerupam collection and jaipur gems mart

Our team of expert editors reviewed these high-quality items and handpicked the top 19 loose gemstones octagon for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the arts & crafts category. These include allstarco usa, deluxe gems, govindstore, tbr intel inc, rainbow star gems, colors of jewels, shop lc, neerupam collection and jaipur gems mart and gemsindustry .

We are dedicated to assisting our users in finding the right gemstones Products based on their needs, saving them considerable time when choosing which loose gemstones octagon to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.