Best Square Loose Diamonds of 2026

John Zimmer Avatar
John Zimmer
Last Updated: 10 Feb 2026

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

Square Loose Diamonds are a popular choice among those looking for a classic and timeless diamond shape. These diamonds are cut in a square shape with pointed corners, also known as a princess cut. They are available in a range of carat weights, colours, and clarities, making them a versatile option for engagement rings, earrings, and other jewellery pieces. Square Loose Diamonds are a perfect choice for those who want a modern and elegant look.

At a Glance: Our Top Picks

JINGANGZUO 15 Colour Square CZ Stones Cover #TOP 1
JINGANGZUO 15 Colour Square CZ Stones
ftb score rating icon 9.9
JIANGYUANGEMS 5A Square Shape Princess Cut White Cubic Zirconia Stone Loose CZ Synthetic Gemstone Cover #TOP 2
JIANGYUANGEMS 5A Square Shape Princess Cut White Cubic Zirconia Stone Loose CZ Synthetic Gemstone
ftb score rating icon 9.8
Natural Black Magnetic Hematite Gemstone 3x5mm Rectangle Square Loose Beads Cover #TOP 3
Natural Black Magnetic Hematite Gemstone 3x5mm Rectangle Square Loose Beads
ftb score rating icon 9.6

Top 10 Square Loose Diamonds

JINGANGZUO 15 Colour Square CZ Stones

JINGANGZUO
Mix 15 Colors
5x5mm 30pcs
JINGANGZUO 15 Colour Square CZ Stones Cover
JINGANGZUO Square Princess Cut Shape Cubic Zirconia Synthetic Gemstone Mix 15 Colors 5A Loose CZ Stone for Jewelry Making, 5x5mm 30pcs, Cubic Zirconia, cubic zirconia

The JINGANGZUO CZ Stones feature a stunning mix of 15 colours, with 30 pieces of square princess cut cubic zirconia stones measuring approximately 5x5mm. This variety allows you to create beautiful and unique jewellery pieces, enhancing your crafting experience. With a temperature resistance of 600 to 700 degrees Celsius, these stones are durable and reliable for various applications. You can use them to make earrings, bracelets, necklaces, rings, and more, making them perfect for both personal projects and gifts.

What We Like
Wide range of colours
Durable temperature resistance
Versatile for multiple crafts
High-quality cubic zirconia
Ideal for DIY jewellery making
#TOP 2

JIANGYUANGEMS 5A Square Shape Princess Cut White Cubic Zirconia Stone Loose CZ Synthetic Gemstone

S-120
white
12x12mm 10pcs
JIANGYUANGEMS 5A Square Shape Princess Cut White Cubic Zirconia Stone Loose CZ Synthetic Gemstone Cover
JIANGYUANGEMS 5A Square Shape Princess Cut White Cubic Zirconia Stone Loose CZ Synthetic Gemstone for Jewelry Making, 12x12mm 10pcs, Cubic Zirconia, cubic zirconia

Features
Temperature Resistance: White Cubic Zirconia Temperature Resistance 1200 To 1500 Degrees Centigrade
Quantity: 10pcs Square Princess Cut Shape Cubic Zirconia Stone To Replace Missing Stones In Jewelry
Wide Applications: Can Be Used For Making Earring, Bracelet, Necklace, Ring, Headwear, Jewelry, Pendants, DIY Craft
Size: About 12x12mm, Product In The Picture May Look Larger Than The Actual, Please Pay Attention To Sizes
More Options: If You Need Other Shapes Color Size Of Cubic Zirconia, Please Search For JIANGYUANGEMS On Amazon
#TOP 3

Natural Black Magnetic Hematite Gemstone 3x5mm Rectangle Square Loose Beads

GEM-INSIDE CREATE YOUR OWN FASHION
G18885
3x5mm
Natural Black Magnetic Hematite Gemstone 3x5mm Rectangle Square Loose Beads Cover
Natural Black Magnetic Hematite Gemstone 3x5mm Rectangle Square Loose Beads for Jewellery Making DIY Bracelet Necklace Crafts 15''

Features
WIDE USAGE: Our Beads Are Excellent For Beading, Jewellery Making, Jewellery Design, DIY Gifts, Arts & Craft, Necklaces, Bracelets, Yoga Bracelets, Earrings, Ring, Home & Wedding Decoration.
Material:Natura Black Magnetic Hematite Semi Precious
This ASIN Create By Sweet & Happy Girl's Store,Click Sold By"Sweet & Happy Girl's Store"Find More Natural Stone.
Return Policy:Our 60-Day Satisfaction Guarantee And Friendly Customer Service, No Questions Will Be Asked If You Are Not Completely Satisfied With The Product And Want To Return It.(If You Are Not Satisfied With The Goods, And Want To Return, Please Do Not Worry About Freight Issues, This By Us To Solve, Please Contact Us By Amazon Mail).
Lead-Free And Nickel-Free, No Harmful Substances

NBEADS 1000pcs 2mm Clear Cubic Zirconia

ZIRC-M002-2mm-007
clear
NBEADS 1000pcs 2mm Clear Cubic Zirconia Cover
NBEADS 1000 Pcs Faceted Clear Diamond Cubic Zirconia Cabochons 2mm, Grade A

The NBEADS Cubic Zirconia set includes 1000 sparkling clear stones, each measuring 2mm in diameter. Made from grade A cubic zirconia, these crystals offer a brilliant shine, perfect for enhancing your necklaces, bracelets, earrings, and rings. The generous quantity ensures you have plenty for multiple projects or repairs. Whether you're a jewellery maker or a hobbyist, these faceted cabochons provide a sparkling finish that adds elegance and charm to your designs.

What We Like
Large quantity: 1000 pieces
Bright, sparkling appearance
Versatile for various jewellery
Small 2mm size for detail
#TOP 5

PH PandaHall 120pcs Colourful CZ Stones

ZIRC-PH0001-43D-04-EU
Multi
PH PandaHall 120pcs Colourful CZ Stones Cover
PH PandaHall 120pcs 6 Colors Cubic Zirconia Stone, 5mm Grade A Faceted CZ Diamante Rhinestone Gems Small Zirconia Gems Cabochons Loose Stones for Ring Earring Bracelet Nail Art DIY Jewellery Making

The PH PandaHall CZ Gems come with 120 high-quality cubic zirconia stones in six vibrant colours, making them perfect for your creative projects. Each 5mm stone is designed with multi-faceted cuts for great transparency and sparkle, allowing you to easily enhance your jewellery or craft items. The included clear plastic container ensures that your gems are stored neatly and are easy to access whenever you need them. These versatile stones can be glued onto various surfaces, making them ideal for a wide range of DIY applications.

What We Like
Six vibrant colours available
High-quality cubic zirconia material
Multi-faceted for added sparkle
Convenient storage container included
Versatile for various DIY projects

Natural Moonstone 4mm Faceted Cube Beads

Moonstone
Natural Moonstone 4mm Faceted Cube Beads Cover
Natural Moonstone Gemstone 4mm Faceted Cube Square Loose Beads 16 Inch for DIY Jewelry Making Beads

The Justinstones Gemstone Beads come in a strand measuring approximately 15 to 16 inches long, featuring between 85 to 100 beads. Each bead is about 4mm in size and weighs around 16g per strand, making them ideal for various DIY jewellery projects. These high-quality loose beads are perfect for creating unique designs, as each one is distinct in colour and markings. Please note that the beads cannot be worn directly, but they offer endless possibilities for personalisation and creativity in your jewellery making.

What We Like
Unique colour variations
High-quality craftsmanship
Ideal for DIY projects
Generous bead quantity
Versatile design options
#TOP 7

AD Beads Natural Hematite Gemstone Faceted Square Cube Loose Beads 16"

Gold,Silver
6x6mm
AD Beads Natural Hematite Gemstone Faceted Square Cube Loose Beads 16" Cover
AD Beads Natural Hematite Gemstone Faceted Square Cube Loose Beads 16" (6x6mm, Metallic Silver)

Features
Material & Shape: 2x2mm, 4x4mm Cube Faceted Cut Is Very Even To Make Nice High End Jewelry. Natural Hematite Non-Magnetic
Condition:Hematite Is Particularly Effective At Grounding And Protecting. It Hamonizes Mind, Body, And Spirit. Used Durig Out-Of-Body Journeying. It Protects The Soul And Grounds It Back Into The Body. This Stone Has A Strong Yang Element And Balances The Meridians. Redressing Yin Imbalances .It Dissolves Negativity And Prevents Negativeenergies From Entering The Aura*. Restoring Peace And Harmony To The Body. Hematite Is Said To Be Bnefical For Legal Situation.
Size: 2x2mm & 4x4mm. Natural Color, Gold, Copper, And Silver Color To Pick Up For Your Needs.
Selling Unit: 1 Strand Of 15.5"-16" Natural Hematite Beads , Size 2x2mm Each String Has About 130 Beads, 4x4mm Eachs String About 100 Beads. The Beads Hole Up To Fix 1mm Any Type String. So It Is Very Convenince To Used For Any Project.
#TOP 8

PH PandaHall 5mm Round Faceted Cubic Zirconia Stones

ZIRC-PH0001-39-US2
9 Colors
5 mm
PH PandaHall 5mm Round Faceted Cubic Zirconia Stones Cover
PH PandaHall Faceted Cabochons, Pointed Back Round Faceted Rhinestone Stones, Loose Cubic Zirconia, 5 mm, Cubic Zirconia, cubic zirconia

PH PandaHall Cubic Zirconia offers a stunning selection of 5mm round brilliant stones in nine vibrant colours. With a total of 450 pieces, you can easily choose and match them to suit your jewellery designs. The high-quality cubic zirconia is durable and features a faceted surface that reflects light beautifully, ensuring your creations stand out. These charming stones are perfect for crafting earrings, bracelets, necklaces, and more, allowing you to add a touch of elegance to your projects with ease.

What We Like
Variety of colours available
High-quality, durable material
Easy to use for crafting
Versatile for multiple applications
#TOP 9

Lot of 10 pieces natural sky blue topaz 2.5mm square shape faceted cut calibrated size loose gemstone

Sylph Gems
SI-SWBT-SQ-2.5mm-10
Blue
2.5mm
Lot of 10 pieces natural sky blue topaz 2.5mm square shape faceted cut calibrated size loose gemstone Cover
Lot of 10 pieces natural sky blue topaz 2.5mm square shape faceted cut calibrated size loose gemstone

Features
This Pack Contains 10 Pieces
AAA Quality Natural Sky Blue Topaz 2.5mm Square Shape Faceted Cut Loose Gemstone For Jewelry Making
The Pieces Shown In The Picture Are For Illustrative Purposes Only, They Are Not Indicative Of The Quantity Of The Gemstones.
Size Variation Of ± 0.1 Mm Are Accepted Worldwide
All Natural Gemstones May Vary Slightly In Color And Pattern Due To Screen Resolution.
#TOP 10

JIANGYUANGEMS 50pcs Marquise White CZ Stones

S-122
white
5x10mm 50pcs
JIANGYUANGEMS 50pcs Marquise White CZ Stones Cover
JIANGYUANGEMS 50pcs 5A Marquise Shape Europe Machine Cut White Cubic Zirconia Stone Loose CZ Synthetic Gemstone for Jewelry Making, 5x10mm 50pcs, Cubic Zirconia, cubic zirconia

JIANGYUANGEMS Marquise CZ Stones offer you 50 high-quality, brilliant cut white cubic zirconia stones, perfect for replacing missing jewels in your jewellery pieces. With impressive temperature resistance of 1200 to 1500 degrees centigrade, these stones are durable and can withstand heat during crafting. Measuring approximately 5x10mm, they are ideal for a variety of jewellery designs, including earrings, bracelets, and necklaces. You can unleash your creativity with these versatile stones, making it easy to craft unique pieces or repair existing ones.

What We Like
High-quality cubic zirconia stones
Temperature resistant up to 1500°C
Ideal for various jewellery projects
50 pieces for extensive use
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What are square cut diamonds called?

Princess Cut Diamond The most popular of the fancy shapes, Princess Cut diamonds are also known as square cut diamonds. As a relatively modern diamond shape, princess cut diamonds have only existed in their current form since the 1960s.

2. Are square diamonds cheaper?

There are many factors that could affect the price of a diamond. But in general, carat for carat, you are likely to find that square princess diamonds are more affordable than round brilliant diamonds. They typically have a lower price-per-carat than their round cut counterparts.

3. Why are square diamonds cheaper?

Less Wastage, Great Saving: The main reason behind the variation in price between these two different diamond shapes is the amount of rough diamond preserved after the diamond is cut.

4. Are loose diamonds worth anything?

The value of loose diamonds does not depend on their age, assuming that they are in good condition. The market value of any loose diamond will depend on the famous “4 C's”—cut, color, carat and clarity. If you purchased the diamond, you probably know its ranking.

Editor's Notes

During our square loose diamond research, we found 80 square loose diamond products and shortlisted 10 quality products. We collected and analyzed 1,809 customer reviews through our big data system to write the square loose diamonds list. We found that most customers choose square loose diamonds with an average price of £17.40.

The square loose diamonds are available for purchase. We have researched hundreds of brands and picked the top brands of square loose diamonds, including JINGANGZUO, JIANGYUANGEMS, GEM-INSIDE CREATE YOUR OWN FASHION, NBEADS, PH PandaHall.

Written by
John Zimmer Avatar

John Zimmer is a truly professional writer on findthisbest.com. He has specialized in writing content a wide variety of fields for over a decade. Since 2011, he has been using his expertise and extensive experience to write content for online shopping guide websites. In addition to writing for findthisbest.com, he has appeared in publications such as The Spruce, Wirecutter and Bestbuy.